C172 N POH states stalling speed ...
.. except one doesn't do these sums with IAS .. speed calcs need to be in CAS with PEC corrections as/when appropriate to get to/from IAS.
IAS is a Mickey Mouse number ... very useful for reference as it is all we can see when pushing and pulling .. but it is still a Mickey Mouse number, not relevant for running sums.
More interestingly, once down towards stall, PECs can get a bit average .. run the sums in CAS and then see what the margins might be ...