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Finding the Fourth Proportional to 138,314.75, 207,472.31 and 38,474.95

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Solution

The fourth proportional to 138,314.75, 207,472.31 and 38,474.95 is: 57,712.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,314.75 : 207,472.31 = 38,474.95 : x
  2. Step 2: Convert to fraction form
    138,314.75/207,472.31 = 38,474.95/x
  3. Step 3: Cross multiply
    138,314.75x = 207,472.31 × 38,474.95
  4. Step 4: Simplify right side
    138,314.75x = 7,982,486,753.63
  5. Step 5: Solve for x
    x = 7,982,486,753.63/138,314.75
  6. Step 6: Final answer
    x = 57,712.48

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1.5x scale

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.