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Finding the Fourth Proportional to 86,339.76, 129,432.80 and 33,737.28

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Solution

The fourth proportional to 86,339.76, 129,432.80 and 33,737.28 is: 50,575.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,339.76 : 129,432.80 = 33,737.28 : x
  2. Step 2: Convert to fraction form
    86,339.76/129,432.80 = 33,737.28/x
  3. Step 3: Cross multiply
    86,339.76x = 129,432.80 × 33,737.28
  4. Step 4: Simplify right side
    86,339.76x = 4,366,710,614.78
  5. Step 5: Solve for x
    x = 4,366,710,614.78/86,339.76
  6. Step 6: Final answer
    x = 50,575.89

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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.