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Finding the Fourth Proportional to 138,774.27, 208,174.47 and 38,934.08

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Solution

The fourth proportional to 138,774.27, 208,174.47 and 38,934.08 is: 58,404.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,774.27 : 208,174.47 = 38,934.08 : x
  2. Step 2: Convert to fraction form
    138,774.27/208,174.47 = 38,934.08/x
  3. Step 3: Cross multiply
    138,774.27x = 208,174.47 × 38,934.08
  4. Step 4: Simplify right side
    138,774.27x = 8,105,080,428.07
  5. Step 5: Solve for x
    x = 8,105,080,428.07/138,774.27
  6. Step 6: Final answer
    x = 58,404.78

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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.