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Finding the Fourth Proportional to 86,513.61, 129,724.15 and 44,376.47

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Solution

The fourth proportional to 86,513.61, 129,724.15 and 44,376.47 is: 66,540.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,513.61 : 129,724.15 = 44,376.47 : x
  2. Step 2: Convert to fraction form
    86,513.61/129,724.15 = 44,376.47/x
  3. Step 3: Cross multiply
    86,513.61x = 129,724.15 × 44,376.47
  4. Step 4: Simplify right side
    86,513.61x = 5,756,699,850.75
  5. Step 5: Solve for x
    x = 5,756,699,850.75/86,513.61
  6. Step 6: Final answer
    x = 66,540.97

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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.