Finding the Fourth Proportional to 86,523.80, 129,785.70 and 71,943.80
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Solution
The fourth proportional to 86,523.80, 129,785.70 and 71,943.80 is: 107,915.70
Step by Step Solution
- Step 1: Write the proportion equation
86,523.80 : 129,785.70 = 71,943.80 : x - Step 2: Convert to fraction form
86,523.80/129,785.70 = 71,943.80/x - Step 3: Cross multiply
86,523.80x = 129,785.70 × 71,943.80 - Step 4: Simplify right side
86,523.80x = 9,337,276,443.66 - Step 5: Solve for x
x = 9,337,276,443.66/86,523.80 - Step 6: Final answer
x = 107,915.70
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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.