Finding the Fourth Proportional to 86,623.26, 129,934.88 and 20,959.26
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Solution
The fourth proportional to 86,623.26, 129,934.88 and 20,959.26 is: 31,438.89
Step by Step Solution
- Step 1: Write the proportion equation
86,623.26 : 129,934.88 = 20,959.26 : x - Step 2: Convert to fraction form
86,623.26/129,934.88 = 20,959.26/x - Step 3: Cross multiply
86,623.26x = 129,934.88 × 20,959.26 - Step 4: Simplify right side
86,623.26x = 2,723,338,932.99 - Step 5: Solve for x
x = 2,723,338,932.99/86,623.26 - Step 6: Final answer
x = 31,438.89
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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.