so first add the ratios= 1+2+3=6 then multiply the first ratio by 42= 1/6×42=7 then multiply the second ratio by 42=2/6×42=14 then multiply the last ratio by 42=3/6×42=21 so it will be 1=7, 2=14, 3=21 to prove it add al the share they got then u will get 42 hope i helped