Let the price of game, marker, pen and book be $w, x, y and z.
[tex]x = \frac{1}{3} y[/tex]
[tex]y = \frac{1}{3} z[/tex]
[tex]z = \frac{1}{3} w[/tex]
[tex]x = \frac{1}{3} y \\ x = \frac{1}{3} ( \frac{1}{ 3} z) \\ x = \frac{1}{3} ( \frac{1}{3} ( \frac{1}{3} w) \\ x = \frac{1}{27} w[/tex]