Calculations like this should only be considered for entertainment purposes. For example, if you were only interested in maintaining a standard of living, then you could probably do so with less than 50K per year, certainly less than 145K.
Back in 1982 the poorest still bought b&w televisions, only luxury cars had air bags, basic cars did not have power windows or air conditioning. Only the very wealthy had cell phones, and almost no one had a personal computer. The average size of a home was around 1500 square feet, where today it is around 2200. One thing that happens is the standard of living rises greatly.
Additionally your needs change. Will you have children? What cycle of child bearing will you be in? Will the kids be grown and gone or will they be in the middle of college. For the former you will probably need less, the later more.
Most significantly things like your financial situation changes. While they probably extrapolate rents with some inflationary figure, often times housing costs go down for many people. Lets say you buy a home large enough to raise a family in about 5 years. Then you pay it off in 25 years, sell it at a large profit, and downsize into a smaller home. It may very well that you own the new home with no mortgage plus have an extra 100K or so in cash. That 100K could be used to generate additional income decreasing your need for extra salary plus your housing costs are basically zero. Sure property tax and insurance will increase, but you won't have a rent/mortgage payment.