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Finding the Fourth Proportional to 138,721.98, 208,031.94 and 49,951.65

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Solution

The fourth proportional to 138,721.98, 208,031.94 and 49,951.65 is: 74,909.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,721.98 : 208,031.94 = 49,951.65 : x
  2. Step 2: Convert to fraction form
    138,721.98/208,031.94 = 49,951.65/x
  3. Step 3: Cross multiply
    138,721.98x = 208,031.94 × 49,951.65
  4. Step 4: Simplify right side
    138,721.98x = 10,391,538,655.70
  5. Step 5: Solve for x
    x = 10,391,538,655.70/138,721.98
  6. Step 6: Final answer
    x = 74,909.10

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