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Finding the Fourth Proportional to 138,414.10, 207,621.15 and 124,854.70

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Solution

The fourth proportional to 138,414.10, 207,621.15 and 124,854.70 is: 187,282.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,414.10 : 207,621.15 = 124,854.70 : x
  2. Step 2: Convert to fraction form
    138,414.10/207,621.15 = 124,854.70/x
  3. Step 3: Cross multiply
    138,414.10x = 207,621.15 × 124,854.70
  4. Step 4: Simplify right side
    138,414.10x = 25,922,476,396.91
  5. Step 5: Solve for x
    x = 25,922,476,396.91/138,414.10
  6. Step 6: Final answer
    x = 187,282.05

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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.