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Finding the Fourth Proportional to 138,394.42, 207,591.82 and 38,554.90

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Solution

The fourth proportional to 138,394.42, 207,591.82 and 38,554.90 is: 57,832.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,394.42 : 207,591.82 = 38,554.90 : x
  2. Step 2: Convert to fraction form
    138,394.42/207,591.82 = 38,554.90/x
  3. Step 3: Cross multiply
    138,394.42x = 207,591.82 × 38,554.90
  4. Step 4: Simplify right side
    138,394.42x = 8,003,681,860.92
  5. Step 5: Solve for x
    x = 8,003,681,860.92/138,394.42
  6. Step 6: Final answer
    x = 57,832.40

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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.