(a+b+c+d):4=1093,75
a+b+c+d=1093,75*4
a+b+c+d=7375
[tex]a= \frac{75}{100} *b= \frac{3}{4} *b[/tex]⇒[tex]b= \frac{4a}{3} [/tex]
b=[tex] \frac{75}{100}*c= \frac{3c}{4} [/tex]
[tex] \frac{4a}{3}= \frac{3c}{4} =\ \textgreater \ c= \frac{16a}{9} [/tex]
c=[tex] \frac{3d}{4} [/tex]
[tex] \frac{16a}{9} = \frac{3d}{4} =\ \textgreater \ d= \frac{64a}{27} [/tex]
[tex]a+ \frac{4a}{3} + \frac{16a}{9} + \frac{64a}{27} =7375[/tex]
27a+36a+48a+64a=7375*27
175a=199125
a=[tex] \frac{7965}{7} [/tex]=1137,(857142)
b=[tex] \frac{10620}{7} [/tex]=1517,(142857)
c=[tex] \frac{14160}{7} [/tex]=2022,(857142)
d=[tex] \frac{18880}{7} [/tex]=2697,(142857)
