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Finding the Fourth Proportional to 135,951.76, 187,635.72 and 78,592.96

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Solution

The fourth proportional to 135,951.76, 187,635.72 and 78,592.96 is: 108,471.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,951.76 : 187,635.72 = 78,592.96 : x
  2. Step 2: Convert to fraction form
    135,951.76/187,635.72 = 78,592.96/x
  3. Step 3: Cross multiply
    135,951.76x = 187,635.72 × 78,592.96
  4. Step 4: Simplify right side
    135,951.76x = 14,746,846,636.53
  5. Step 5: Solve for x
    x = 14,746,846,636.53/135,951.76
  6. Step 6: Final answer
    x = 108,471.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.