Finding the Fourth Proportional to 86,577.60, 129,915.36 and 47,137.44
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Solution
The fourth proportional to 86,577.60, 129,915.36 and 47,137.44 is: 70,732.82
Step by Step Solution
- Step 1: Write the proportion equation
86,577.60 : 129,915.36 = 47,137.44 : x - Step 2: Convert to fraction form
86,577.60/129,915.36 = 47,137.44/x - Step 3: Cross multiply
86,577.60x = 129,915.36 × 47,137.44 - Step 4: Simplify right side
86,577.60x = 6,123,877,487.08 - Step 5: Solve for x
x = 6,123,877,487.08/86,577.60 - Step 6: Final answer
x = 70,732.82
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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.