Finding the Fourth Proportional to 86,650.62, 129,975.96 and 31,246.62
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Solution
The fourth proportional to 86,650.62, 129,975.96 and 31,246.62 is: 46,869.94
Step by Step Solution
- Step 1: Write the proportion equation
86,650.62 : 129,975.96 = 31,246.62 : x - Step 2: Convert to fraction form
86,650.62/129,975.96 = 31,246.62/x - Step 3: Cross multiply
86,650.62x = 129,975.96 × 31,246.62 - Step 4: Simplify right side
86,650.62x = 4,061,309,431.26 - Step 5: Solve for x
x = 4,061,309,431.26/86,650.62 - Step 6: Final answer
x = 46,869.94
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Double scale
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Similar ratio
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1.5x scale
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.