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Finding the Fourth Proportional to 138,426.96, 207,630.10 and 54,170.96

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Solution

The fourth proportional to 138,426.96, 207,630.10 and 54,170.96 is: 81,252.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,426.96 : 207,630.10 = 54,170.96 : x
  2. Step 2: Convert to fraction form
    138,426.96/207,630.10 = 54,170.96/x
  3. Step 3: Cross multiply
    138,426.96x = 207,630.10 × 54,170.96
  4. Step 4: Simplify right side
    138,426.96x = 11,247,521,841.90
  5. Step 5: Solve for x
    x = 11,247,521,841.90/138,426.96
  6. Step 6: Final answer
    x = 81,252.39

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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.