Finding the Fourth Proportional to 128,361.25, 192,459.86 and 61,668.68
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Solution
The fourth proportional to 128,361.25, 192,459.86 and 61,668.68 is: 92,463.62
Step by Step Solution
- Step 1: Write the proportion equation
128,361.25 : 192,459.86 = 61,668.68 : x - Step 2: Convert to fraction form
128,361.25/192,459.86 = 61,668.68/x - Step 3: Cross multiply
128,361.25x = 192,459.86 × 61,668.68 - Step 4: Simplify right side
128,361.25x = 11,868,745,210.84 - Step 5: Solve for x
x = 11,868,745,210.84/128,361.25 - Step 6: Final answer
x = 92,463.62
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.