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Finding the Fourth Proportional to 138,414.60, 207,621.90 and 124,855.20

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Solution

The fourth proportional to 138,414.60, 207,621.90 and 124,855.20 is: 187,282.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,414.60 : 207,621.90 = 124,855.20 : x
  2. Step 2: Convert to fraction form
    138,414.60/207,621.90 = 124,855.20/x
  3. Step 3: Cross multiply
    138,414.60x = 207,621.90 × 124,855.20
  4. Step 4: Simplify right side
    138,414.60x = 25,922,673,848.88
  5. Step 5: Solve for x
    x = 25,922,673,848.88/138,414.60
  6. Step 6: Final answer
    x = 187,282.80

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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.