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Finding the Fourth Proportional to 138,799.73, 208,168.47 and 63,847.91

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Solution

The fourth proportional to 138,799.73, 208,168.47 and 63,847.91 is: 95,757.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,799.73 : 208,168.47 = 63,847.91 : x
  2. Step 2: Convert to fraction form
    138,799.73/208,168.47 = 63,847.91/x
  3. Step 3: Cross multiply
    138,799.73x = 208,168.47 × 63,847.91
  4. Step 4: Simplify right side
    138,799.73x = 13,291,122,257.82
  5. Step 5: Solve for x
    x = 13,291,122,257.82/138,799.73
  6. Step 6: Final answer
    x = 95,757.55

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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.