<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by CompSci Transform (tm) - http://www.compsciresources.com -->
<!-- Created: Mon May 24 02:06:41 UTC 2021 -->
<xs:schema elementFormDefault="qualified" xmlns:ftiv="http://www.ftivu.com/20210331" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:srt-types="http://fasb.org/srt-types/2020-01-31" targetNamespace="http://www.ftivu.com/20210331" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:us-types="http://fasb.org/us-types/2020-01-31" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance">
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xlink:type="simple" xlink:href="ftiv-20210331_lab.xml" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef"/>
      <link:linkbaseRef xlink:type="simple" xlink:href="ftiv-20210331_pre.xml" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef"/>
      <link:linkbaseRef xlink:type="simple" xlink:href="ftiv-20210331_def.xml" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef"/>
      <link:linkbaseRef xlink:type="simple" xlink:href="ftiv-20210331_cal.xml" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef"/>
      <link:roleType roleURI="http://www.ftivu.com/role/ConsolidatedBalanceSheet" id="ftiv_r_ConsolidatedBalanceSheet">
        <link:definition>001 - Statement - Condensed Balance Sheets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/ConsolidatedBalanceSheet_Parentheticals" id="ftiv_r_ConsolidatedBalanceSheet_Parentheticals">
        <link:definition>002 - Statement - Condensed Balance Sheets (Parentheticals)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/ConsolidatedIncomeStatement" id="ftiv_r_ConsolidatedIncomeStatement">
        <link:definition>003 - Statement - Condensed Statements of Operations (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/ShareholdersEquityType2or3" id="ftiv_r_ShareholdersEquityType2or3">
        <link:definition>004 - Statement - Condensed Statements of Changes in Stockholders&#8217; Equity (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/ConsolidatedCashFlow" id="ftiv_r_ConsolidatedCashFlow">
        <link:definition>005 - Statement - Condensed Statements of Cash Flows (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/DescriptionofOrganizationandBusinessOperations" id="ftiv_r_DescriptionofOrganizationandBusinessOperations">
        <link:definition>006 - Disclosure - Description of Organization and Business Operations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/SummaryofSignificantAccountingPolicies" id="ftiv_r_SummaryofSignificantAccountingPolicies">
        <link:definition>007 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/InitialPublicOffering" id="ftiv_r_InitialPublicOffering">
        <link:definition>008 - Disclosure - Initial Public Offering</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/PrivatePlacement" id="ftiv_r_PrivatePlacement">
        <link:definition>009 - Disclosure - Private Placement</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/RelatedPartyTransactions" id="ftiv_r_RelatedPartyTransactions">
        <link:definition>010 - Disclosure - Related Party Transactions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/CommitmentsandContingencies" id="ftiv_r_CommitmentsandContingencies">
        <link:definition>011 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/StockholdersEquity" id="ftiv_r_StockholdersEquity">
        <link:definition>012 - Disclosure - Stockholders&#8217; Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/Warrants" id="ftiv_r_Warrants">
        <link:definition>013 - Disclosure - Warrants</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/FairValueMeasurements" id="ftiv_r_FairValueMeasurements">
        <link:definition>014 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/SubsequentEvents" id="ftiv_r_SubsequentEvents">
        <link:definition>015 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/AccountingPoliciesByPolicy" id="ftiv_r_AccountingPoliciesByPolicy">
        <link:definition>016 - Disclosure - Accounting Policies, by Policy (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/SummaryofSignificantAccountingPoliciesTables" id="ftiv_r_SummaryofSignificantAccountingPoliciesTables">
        <link:definition>017 - Disclosure - Summary of Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/FairValueMeasurementsTables" id="ftiv_r_FairValueMeasurementsTables">
        <link:definition>018 - Disclosure - Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/DescriptionofOrganizationandBusinessOperationsDetails" id="ftiv_r_DescriptionofOrganizationandBusinessOperationsDetails">
        <link:definition>019 - Disclosure - Description of Organization and Business Operations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/SummaryofSignificantAccountingPoliciesDetails" id="ftiv_r_SummaryofSignificantAccountingPoliciesDetails">
        <link:definition>020 - Disclosure - Summary of Significant Accounting Policies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/ScheduleofbasicanddilutednetincomelosspercommonshareTable" id="ftiv_r_ScheduleofbasicanddilutednetincomelosspercommonshareTable">
        <link:definition>021 - Disclosure - Summary of Significant Accounting Policies (Details) - Schedule of basic and diluted net income (loss) per common share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/InitialPublicOfferingDetails" id="ftiv_r_InitialPublicOfferingDetails">
        <link:definition>022 - Disclosure - Initial Public Offering (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/PrivatePlacementDetails" id="ftiv_r_PrivatePlacementDetails">
        <link:definition>023 - Disclosure - Private Placement (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/RelatedPartyTransactionsDetails" id="ftiv_r_RelatedPartyTransactionsDetails">
        <link:definition>024 - Disclosure - Related Party Transactions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
<!-- [WMV5][XcpuxYn59dz7vgYynUDuwG7r97K2jUTysl7vcz0lJt/tSeJz73kx1cLt0ZFF2SK/vxBCY0vdSranacYFCv3emkfskgkEbfPgZ2yhDO0i5HLs6VWt0S4yELNUJHx+DnIatlUlKT7tqWJQrLsG/3pF9xXrL0U06tGVg7Qtx1HffVRcQ53igERE/Y5DjjqEpFaThwaxMJVEhsrv0W/pGCb0hAoN3fzEAiPynXosh5iMyPPCs5amwhg+rJPgJxZm5Vaeot7kONoqjag0m6QSuSKqw7HbNM3YapSHhsZGpc0PJqlsi100IYkXAg==] CSR-->
      <link:roleType roleURI="http://www.ftivu.com/role/CommitmentsandContingenciesDetails" id="ftiv_r_CommitmentsandContingenciesDetails">
        <link:definition>025 - Disclosure - Commitments and Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/StockholdersEquityDetails" id="ftiv_r_StockholdersEquityDetails">
        <link:definition>026 - Disclosure - Stockholders&#8217; Equity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/WarrantsDetails" id="ftiv_r_WarrantsDetails">
        <link:definition>027 - Disclosure - Warrants (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/FairValueMeasurementsDetails" id="ftiv_r_FairValueMeasurementsDetails">
        <link:definition>028 - Disclosure - Fair Value Measurements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/ScheduleofassetsthataremeasuredatfairvalueonarecurringbasisTable" id="ftiv_r_ScheduleofassetsthataremeasuredatfairvalueonarecurringbasisTable">
        <link:definition>029 - Disclosure - Fair Value Measurements (Details) - Schedule of assets that are measured at fair value on a recurring basis</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/ScheduleoffairvalueofprivateplacementwarrantsTable" id="ftiv_r_ScheduleoffairvalueofprivateplacementwarrantsTable">
        <link:definition>030 - Disclosure - Fair Value Measurements (Details) - Schedule of fair value of private placement warrants</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/ScheduleofchangesinthefairvalueofwarrantliabilitiesTable" id="ftiv_r_ScheduleofchangesinthefairvalueofwarrantliabilitiesTable">
        <link:definition>031 - Disclosure - Fair Value Measurements (Details) - Schedule of changes in the fair value of warrant liabilities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ftivu.com/role/DocumentAndEntityInformation" id="DocumentAndEntityInformation">
        <link:definition>000 - Document - Document And Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://fasb.org/us-types/2020-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2020/elts/us-types-2020-01-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://fasb.org/srt-types/2020-01-31" schemaLocation="http://xbrl.fasb.org/srt/2020/elts/srt-types-2020-01-31.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/sic/2020-01-31" schemaLocation="https://xbrl.sec.gov/sic/2020/sic-2020-01-31.xsd"/>
  <xs:element name="ScheduleOfBasicAndDilutedNetIncomeLossPerCommonShareAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_ScheduleOfBasicAndDilutedNetIncomeLossPerCommonShareAbstract"/>
  <xs:element name="InitialPublicOfferingAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_InitialPublicOfferingAbstract"/>
  <xs:element name="PrivatePlacementsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_PrivatePlacementsAbstract"/>
  <xs:element name="WarrantsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_WarrantsAbstract"/>
  <xs:element name="ScheduleOfAssetsThatAreMeasuredAtFairValueOnARecurringBasisAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_ScheduleOfAssetsThatAreMeasuredAtFairValueOnARecurringBasisAbstract"/>
  <xs:element name="ScheduleOfFairValueOfPrivatePlacementWarrantsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_ScheduleOfFairValueOfPrivatePlacementWarrantsAbstract"/>
  <xs:element name="ScheduleOfChangesInTheFairValueOfWarrantLiabilitiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_ScheduleOfChangesInTheFairValueOfWarrantLiabilitiesAbstract"/>
  <xs:element name="RedeemableClassACommonStockAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_RedeemableClassACommonStockAbstract"/>
  <xs:element name="NumeratorEarningsAllocableToRedeemableClassACommonStockAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_NumeratorEarningsAllocableToRedeemableClassACommonStockAbstract"/>
  <xs:element name="DenominatorWeightedAverageRedeemableClassACommonStockAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_DenominatorWeightedAverageRedeemableClassACommonStockAbstract"/>
  <xs:element name="NonRedeemableClassAAndBCommonStockAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_NonRedeemableClassAAndBCommonStockAbstract"/>
  <xs:element name="NumeratorNetIncomeMinusRedeemableNetEarningsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_NumeratorNetIncomeMinusRedeemableNetEarningsAbstract"/>
  <xs:element name="DenominatorWeightedAverageNonRedeemableClassAAndBCommonStockAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_DenominatorWeightedAverageNonRedeemableClassAAndBCommonStockAbstract"/>
  <xs:element name="AccruedOfferingCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_AccruedOfferingCosts"/>
  <xs:element name="CommonStockValueOne" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_CommonStockValueOne"/>
  <xs:element name="CommonStockSubjectToPossibleRedemption" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ftiv_CommonStockSubjectToPossibleRedemption"/>
  <xs:element name="CommonStockSubjectToPossibleRedemptionParValue" type="num:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ftiv_CommonStockSubjectToPossibleRedemptionParValue"/>
  <xs:element name="InterestEarnedOnMarketableSecuritiesHeldInTrustAccount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_InterestEarnedOnMarketableSecuritiesHeldInTrustAccount"/>
  <xs:element name="WeightedAverageSharesOutstandingOfClassARedeemableCommonStockinShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_WeightedAverageSharesOutstandingOfClassARedeemableCommonStockinShares"/>
  <xs:element name="IssuanceOfStockForStockSubscriptionReceivableFromStockholder" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_IssuanceOfStockForStockSubscriptionReceivableFromStockholder"/>
  <xs:element name="InitialPublicOfferingTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_InitialPublicOfferingTextBlock"/>
  <xs:element name="PrivatePlacementsTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_PrivatePlacementsTextBlock"/>
  <xs:element name="WarrantsTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_WarrantsTextBlock"/>
  <xs:element name="EmergingGrowthCompanyPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_EmergingGrowthCompanyPolicyTextBlock"/>
  <xs:element name="OfferingCostsPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_OfferingCostsPolicyTextBlock"/>
  <xs:element name="WarrantLiabilitiesPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_WarrantLiabilitiesPolicyTextBlock"/>
  <xs:element name="FairValueOfPrivatePlacementWarrantsTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_FairValueOfPrivatePlacementWarrantsTableTextBlock"/>
  <xs:element name="SummaryofSignificantAccountingPoliciesDetailsScheduleofbasicanddilutednetincomelosspercommonshareTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ftiv_SummaryofSignificantAccountingPoliciesDetailsScheduleofbasicanddilutednetincomelosspercommonshareTable"/>
  <xs:element name="SummaryofSignificantAccountingPoliciesDetailsScheduleofbasicanddilutednetincomelosspercommonshareLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_SummaryofSignificantAccountingPoliciesDetailsScheduleofbasicanddilutednetincomelosspercommonshareLineItems"/>
  <xs:element name="IncomeAndFranchiseTaxinDollars" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_IncomeAndFranchiseTaxinDollars"/>
  <xs:element name="NetEarnings" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_NetEarnings"/>
  <xs:element name="RedeemableNetEarnings" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_RedeemableNetEarnings"/>
  <xs:element name="NonRedeemableClassAandBCommonStockBasicandDiluted" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_NonRedeemableClassAandBCommonStockBasicandDiluted"/>
  <xs:element name="LossBasicAndDilutedNonRedeemableClassAAndBCommonStock" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_LossBasicAndDilutedNonRedeemableClassAAndBCommonStock"/>
  <xs:element name="FairValueMeasurementsDetailsScheduleofassetsthataremeasuredatfairvalueonarecurringbasisTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ftiv_FairValueMeasurementsDetailsScheduleofassetsthataremeasuredatfairvalueonarecurringbasisTable"/>
  <xs:element name="FairValueMeasurementsDetailsScheduleofassetsthataremeasuredatfairvalueonarecurringbasisLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_FairValueMeasurementsDetailsScheduleofassetsthataremeasuredatfairvalueonarecurringbasisLineItems"/>
  <xs:element name="FairValueMeasurementsDetailsScheduleofchangesinthefairvalueofwarrantliabilitiesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ftiv_FairValueMeasurementsDetailsScheduleofchangesinthefairvalueofwarrantliabilitiesTable"/>
  <xs:element name="FairValueMeasurementsDetailsScheduleofchangesinthefairvalueofwarrantliabilitiesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_FairValueMeasurementsDetailsScheduleofchangesinthefairvalueofwarrantliabilitiesLineItems"/>
  <xs:element name="DescriptionofOrganizationandBusinessOperationsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ftiv_DescriptionofOrganizationandBusinessOperationsDetailsTable"/>
  <xs:element name="DescriptionofOrganizationandBusinessOperationsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_DescriptionofOrganizationandBusinessOperationsDetailsLineItems"/>
  <xs:element name="netProceedsAreTheAmountOfCashReceived" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_netProceedsAreTheAmountOfCashReceived"/>
  <xs:element name="DeferredUnderwritingFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_DeferredUnderwritingFees"/>
  <xs:element name="PercentageOfPublicShares" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ftiv_PercentageOfPublicShares"/>
  <xs:element name="PercentageOfFairmarketValue" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_PercentageOfFairmarketValue"/>
  <xs:element name="RedeemInPublicShares" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_RedeemInPublicShares"/>
  <xs:element name="FranchiseAndIncomeTaxesDissolutionExpenses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_FranchiseAndIncomeTaxesDissolutionExpenses"/>
  <xs:element name="RedeemptionPercent" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_RedeemptionPercent"/>
  <xs:element name="ProposedOffering" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_ProposedOffering"/>
  <xs:element name="SummaryofSignificantAccountingPoliciesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ftiv_SummaryofSignificantAccountingPoliciesDetailsTable"/>
  <xs:element name="SummaryofSignificantAccountingPoliciesDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_SummaryofSignificantAccountingPoliciesDetailsLineItems"/>
  <xs:element name="CommonStockSubjectsToPossibleRedemption" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ftiv_CommonStockSubjectsToPossibleRedemption"/>
  <xs:element name="UnderwritingFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_UnderwritingFees"/>
  <xs:element name="OtherOfferingCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_OtherOfferingCosts"/>
  <xs:element name="ChargedToExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_ChargedToExpense"/>
  <xs:element name="ChargedToStockholdersEquity" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_ChargedToStockholdersEquity"/>
  <xs:element name="PrivatePlacementToPurchasesSharesOfCommonStock" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_PrivatePlacementToPurchasesSharesOfCommonStock"/>
  <xs:element name="InitialPublicOfferingDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ftiv_InitialPublicOfferingDetailsTable"/>
  <xs:element name="InitialPublicOfferingDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_InitialPublicOfferingDetailsLineItems"/>
  <xs:element name="OverAllotmentOptionUnit" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_OverAllotmentOptionUnit"/>
  <xs:element name="PurchasePricePerUnit" type="num:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ftiv_PurchasePricePerUnit"/>
  <xs:element name="StockExercisePrice" type="num:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ftiv_StockExercisePrice"/>
  <xs:element name="PrivatePlacementDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ftiv_PrivatePlacementDetailsTable"/>
  <xs:element name="PrivatePlacementDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_PrivatePlacementDetailsLineItems"/>
  <xs:element name="RelatedPartyTransactionsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ftiv_RelatedPartyTransactionsDetailsTable"/>
  <xs:element name="RelatedPartyTransactionsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_RelatedPartyTransactionsDetailsLineItems"/>
  <xs:element name="SponsorShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_SponsorShares"/>
  <xs:element name="CommonStockSubjectToForfeiture" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ftiv_CommonStockSubjectToForfeiture"/>
  <xs:element name="FounderSharesPercentage" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_FounderSharesPercentage"/>
  <xs:element name="FounderSharesShortTermSubjectToForfeiture" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_FounderSharesShortTermSubjectToForfeiture"/>
  <xs:element name="ServicesFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_ServicesFees"/>
  <xs:element name="WorkingCapitalLoan" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_WorkingCapitalLoan"/>
  <xs:element name="PIPEDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_PIPEDomain"/>
  <xs:element name="CommitmentsandContingenciesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ftiv_CommitmentsandContingenciesDetailsTable"/>
  <xs:element name="CommitmentsandContingenciesDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_CommitmentsandContingenciesDetailsLineItems"/>
  <xs:element name="DeferredFeeValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_DeferredFeeValue"/>
  <xs:element name="CommonStockDescription" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_CommonStockDescription"/>
  <xs:element name="StockholdersEquityDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ftiv_StockholdersEquityDetailsTable"/>
  <xs:element name="StockholdersEquityDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_StockholdersEquityDetailsLineItems"/>
  <xs:element name="CommonStocksSubjectToPossibleRedemption" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ftiv_CommonStocksSubjectToPossibleRedemption"/>
  <xs:element name="CommonStockConversionBasisPercent" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_CommonStockConversionBasisPercent"/>
  <xs:element name="WarrantsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ftiv_WarrantsDetailsTable"/>
  <xs:element name="WarrantsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_WarrantsDetailsLineItems"/>
  <xs:element name="WarrantExpires" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_WarrantExpires"/>
  <xs:element name="AgreementDescription" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_AgreementDescription"/>
  <xs:element name="PublicWarrants" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_PublicWarrants"/>
  <xs:element name="fairValueOfPublicWarrants" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ftiv_fairValueOfPublicWarrants"/>
  <xs:element name="PIPEAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem" id="ftiv_PIPEAxis"/>
  <xs:element name="CantorFitzgeraldAndCoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_CantorFitzgeraldAndCoMember"/>
  <xs:element name="ClassAAndClassBNonredeemableCommonStockMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_ClassAAndClassBNonredeemableCommonStockMember"/>
  <xs:element name="ClassARedeemableCommonStockMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_ClassARedeemableCommonStockMember"/>
  <xs:element name="FounderSharesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_FounderSharesMember"/>
  <xs:element name="NonRedeemableClassCommonStockMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_NonRedeemableClassCommonStockMember"/>
  <xs:element name="PIPEInvestorsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_PIPEInvestorsMember"/>
  <xs:element name="PrivatePlacementWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_PrivatePlacementWarrantsMember"/>
  <xs:element name="PublicMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_PublicMember"/>
  <xs:element name="PublicWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_PublicWarrantsMember"/>
  <xs:element name="RedeemableClassACommonStockMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_RedeemableClassACommonStockMember"/>
  <xs:element name="WarrantLiabilitiesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_WarrantLiabilitiesMember"/>
  <xs:element name="WellsFargoSecuritiesLLCMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_WellsFargoSecuritiesLLCMember"/>
  <xs:element name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ftiv_DocumentAndEntityInformationAbstract"/>
</xs:schema>
