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Finding the Fourth Proportional to 129,179.80, 178,246.57 and 71,817.52

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Solution

The fourth proportional to 129,179.80, 178,246.57 and 71,817.52 is: 99,096.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,179.80 : 178,246.57 = 71,817.52 : x
  2. Step 2: Convert to fraction form
    129,179.80/178,246.57 = 71,817.52/x
  3. Step 3: Cross multiply
    129,179.80x = 178,246.57 × 71,817.52
  4. Step 4: Simplify right side
    129,179.80x = 12,801,226,605.91
  5. Step 5: Solve for x
    x = 12,801,226,605.91/129,179.80
  6. Step 6: Final answer
    x = 99,096.19

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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.