Finding the Fourth Proportional to 86,645.13, 129,967.71 and 31,241.13
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Solution
The fourth proportional to 86,645.13, 129,967.71 and 31,241.13 is: 46,861.70
Step by Step Solution
- Step 1: Write the proportion equation
86,645.13 : 129,967.71 = 31,241.13 : x - Step 2: Convert to fraction form
86,645.13/129,967.71 = 31,241.13/x - Step 3: Cross multiply
86,645.13x = 129,967.71 × 31,241.13 - Step 4: Simplify right side
86,645.13x = 4,060,338,123.91 - Step 5: Solve for x
x = 4,060,338,123.91/86,645.13 - Step 6: Final answer
x = 46,861.70
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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.