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Finding the Fourth Proportional to 138,167.80, 207,251.70 and 127,670.20

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Solution

The fourth proportional to 138,167.80, 207,251.70 and 127,670.20 is: 191,505.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,167.80 : 207,251.70 = 127,670.20 : x
  2. Step 2: Convert to fraction form
    138,167.80/207,251.70 = 127,670.20/x
  3. Step 3: Cross multiply
    138,167.80x = 207,251.70 × 127,670.20
  4. Step 4: Simplify right side
    138,167.80x = 26,459,865,989.34
  5. Step 5: Solve for x
    x = 26,459,865,989.34/138,167.80
  6. Step 6: Final answer
    x = 191,505.30

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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.