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Finding the Fourth Proportional to 138,519.97, 207,768.85 and 61,606.78

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Solution

The fourth proportional to 138,519.97, 207,768.85 and 61,606.78 is: 92,405.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,519.97 : 207,768.85 = 61,606.78 : x
  2. Step 2: Convert to fraction form
    138,519.97/207,768.85 = 61,606.78/x
  3. Step 3: Cross multiply
    138,519.97x = 207,768.85 × 61,606.78
  4. Step 4: Simplify right side
    138,519.97x = 12,799,969,159.36
  5. Step 5: Solve for x
    x = 12,799,969,159.36/138,519.97
  6. Step 6: Final answer
    x = 92,405.22

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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.