Divide up the number 108 in a 3:4:5 ratio.

Ok first you add up 3+4+5 that equals 12 then you divide 108 by 12 that equals 9 then you multiply 3*9=27 4*9=36 5*9=45 the nadd them all up to check 27+36+45=108 so the ratio is 27:36:45