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Finding the Fourth Proportional to 138,630.83, 207,924.56 and 45,135.95

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Solution

The fourth proportional to 138,630.83, 207,924.56 and 45,135.95 is: 67,696.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,630.83 : 207,924.56 = 45,135.95 : x
  2. Step 2: Convert to fraction form
    138,630.83/207,924.56 = 45,135.95/x
  3. Step 3: Cross multiply
    138,630.83x = 207,924.56 × 45,135.95
  4. Step 4: Simplify right side
    138,630.83x = 9,384,872,318.25
  5. Step 5: Solve for x
    x = 9,384,872,318.25/138,630.83
  6. Step 6: Final answer
    x = 67,696.86

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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.