\[1)\ x\ :y = \frac{1}{4}:6\]
\[x = \frac{1 \cdot y}{4 \cdot 6} = \frac{y}{24}.\]
\[2)\ y\ :z = 8\ :5\]
\[z = \frac{y \cdot 5}{8} = \frac{5y}{8}.\]
\[3)\ \frac{y}{24} + y + \frac{5y}{8} = 200\]
\[\frac{y + 24y + 15y}{24} = 200\]
\[40y = 4800\]
\[y = 120.\]
\[4)\ x = \frac{y}{24} = \frac{120}{24} = 5\]
\[z = \frac{5y}{8} = \frac{5 \cdot 120}{8} = 75.\]
\[Ответ:200 = 5 + 120 + 75\]