Finding the Fourth Proportional to 86,511.44, 129,706.68 and 39,738.80
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Solution
The fourth proportional to 86,511.44, 129,706.68 and 39,738.80 is: 59,580.42
Step by Step Solution
- Step 1: Write the proportion equation
86,511.44 : 129,706.68 = 39,738.80 : x - Step 2: Convert to fraction form
86,511.44/129,706.68 = 39,738.80/x - Step 3: Cross multiply
86,511.44x = 129,706.68 × 39,738.80 - Step 4: Simplify right side
86,511.44x = 5,154,387,815.18 - Step 5: Solve for x
x = 5,154,387,815.18/86,511.44 - Step 6: Final answer
x = 59,580.42
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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.