Finding the Fourth Proportional to 86,724.48, 129,985.36 and 36,787.68
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Solution
The fourth proportional to 86,724.48, 129,985.36 and 36,787.68 is: 55,138.52
Step by Step Solution
- Step 1: Write the proportion equation
86,724.48 : 129,985.36 = 36,787.68 : x - Step 2: Convert to fraction form
86,724.48/129,985.36 = 36,787.68/x - Step 3: Cross multiply
86,724.48x = 129,985.36 × 36,787.68 - Step 4: Simplify right side
86,724.48x = 4,781,859,828.36 - Step 5: Solve for x
x = 4,781,859,828.36/86,724.48 - Step 6: Final answer
x = 55,138.52
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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.