In this paper, we prove stabilities of multiplicative functional equations in three variables such as $r(frac{x+y+z}{3})-r(x+y+z)$=$frac{2r(frac{x+y}{2})r(frac{y+z}{2})r(frac{z+x}{2})}{r(frac{x+y}{2})r(frac{y+z}{2})+r(frac{y+z}{2})r(frac{z+x}{2})+r(frac{z+x}{2})r(frac{x+y}{2})}$ and $r(frac{x+y+z}{3})+r(x+y+z)$=$frac{4r(frac{x+y}{2})r(frac{y+z}{2})r(frac{z+x}{2})}{r(frac{x+y}{2})r(frac{y+z}{2})+r(frac{y+z}{2})r(frac{z+x}{2})+r(frac{z+x}{2})r(frac{x+y}{2})}$.