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Finding the Fourth Proportional to 138,791.44, 208,215.96 and 55,691.92

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Solution

The fourth proportional to 138,791.44, 208,215.96 and 55,691.92 is: 83,549.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,791.44 : 208,215.96 = 55,691.92 : x
  2. Step 2: Convert to fraction form
    138,791.44/208,215.96 = 55,691.92/x
  3. Step 3: Cross multiply
    138,791.44x = 208,215.96 × 55,691.92
  4. Step 4: Simplify right side
    138,791.44x = 11,595,946,587.04
  5. Step 5: Solve for x
    x = 11,595,946,587.04/138,791.44
  6. Step 6: Final answer
    x = 83,549.44

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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.