Răspuns:
4/6 = 36/54 = 72/108 = 2/3 , sint direct proportionale.
Explicație pas cu pas:
4 ; 36 ; 72 sint direct proportionale cu 6 ; 54 ; 108 ?
4/6 ⁽² = 2/3
36/54⁽⁶ = 6/9⁽³ = 2/3
72/108⁽⁶ = 12/18⁽⁶ = 2/3 =>
4/6 = 36/54 = 72/108 = 2/3 , sint direct proportionale.