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Finding the Fourth Proportional to 138,645.27, 207,936.05 and 38,812.37

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Solution

The fourth proportional to 138,645.27, 207,936.05 and 38,812.37 is: 58,209.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,645.27 : 207,936.05 = 38,812.37 : x
  2. Step 2: Convert to fraction form
    138,645.27/207,936.05 = 38,812.37/x
  3. Step 3: Cross multiply
    138,645.27x = 207,936.05 × 38,812.37
  4. Step 4: Simplify right side
    138,645.27x = 8,070,489,675.20
  5. Step 5: Solve for x
    x = 8,070,489,675.20/138,645.27
  6. Step 6: Final answer
    x = 58,209.63

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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.