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Finding the Fourth Proportional to 138,791.88, 208,191.06 and 63,974.61

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Solution

The fourth proportional to 138,791.88, 208,191.06 and 63,974.61 is: 95,963.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,791.88 : 208,191.06 = 63,974.61 : x
  2. Step 2: Convert to fraction form
    138,791.88/208,191.06 = 63,974.61/x
  3. Step 3: Cross multiply
    138,791.88x = 208,191.06 × 63,974.61
  4. Step 4: Simplify right side
    138,791.88x = 13,318,941,868.99
  5. Step 5: Solve for x
    x = 13,318,941,868.99/138,791.88
  6. Step 6: Final answer
    x = 95,963.41

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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.