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Finding the Fourth Proportional to 138,356.20, 207,534.30 and 125,890.30

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Solution

The fourth proportional to 138,356.20, 207,534.30 and 125,890.30 is: 188,835.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,356.20 : 207,534.30 = 125,890.30 : x
  2. Step 2: Convert to fraction form
    138,356.20/207,534.30 = 125,890.30/x
  3. Step 3: Cross multiply
    138,356.20x = 207,534.30 × 125,890.30
  4. Step 4: Simplify right side
    138,356.20x = 26,126,555,287.29
  5. Step 5: Solve for x
    x = 26,126,555,287.29/138,356.20
  6. Step 6: Final answer
    x = 188,835.45

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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.