Question
A box contains some brown, black and gold mochi balls. The ratio of the number of brown mochi balls to the number of black mochi balls is 9 : 4. The ratio of the number of black mochi balls to the number of gold mochi balls is also 9 : 4. What is the ratio of the number of brown mochi balls to the number of gold mochi balls in the box?
2 m

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A box contains some brown, black and gold mochi balls. The ratio of the number of brown mochi balls to the number of black mochi balls is 9 : 4. The ratio of the number of black mochi balls to the number of gold mochi balls is also 9 : 4. What is the ratio of the number of brown mochi balls to the number of gold mochi balls in the box?