Hi Wallace...
Divide the original length by the scale............152 divided by 24 (NOT 1.24) = 6.3333333333 feet = 6'4"
If the scale was 1:48 then it would be 152 divided by 48 = 3.16666666 feet = 3'2"
at 1:96 then it would be 152 divided by 96 = 1.5833333 feet = 1'7" or thereabouts
Carl