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Finding the Fourth Proportional to 138,311.70, 207,467.55 and 123,537.30

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Solution

The fourth proportional to 138,311.70, 207,467.55 and 123,537.30 is: 185,305.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,311.70 : 207,467.55 = 123,537.30 : x
  2. Step 2: Convert to fraction form
    138,311.70/207,467.55 = 123,537.30/x
  3. Step 3: Cross multiply
    138,311.70x = 207,467.55 × 123,537.30
  4. Step 4: Simplify right side
    138,311.70x = 25,629,980,964.62
  5. Step 5: Solve for x
    x = 25,629,980,964.62/138,311.70
  6. Step 6: Final answer
    x = 185,305.95

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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.