a+b+c=72.454
a=b/3
a =4c ;c =a/4 ; c =b/3 /4 ;c =b/3*1/4 =b/12 inlocuim pe a si c in prima relatie
b/3 +b +b/12 =72.454 numitor 12
4b +12b +b =869.448
17b =869.448
b =51.144
a =b/3 =51.144/3 =17.048
c =a /4 =17.048/4 =4.262
(verif : 17.048+51.144+4.262 =72.454)