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Finding the Fourth Proportional to 138,670.88, 208,001.28 and 49,904.48

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Solution

The fourth proportional to 138,670.88, 208,001.28 and 49,904.48 is: 74,854.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,670.88 : 208,001.28 = 49,904.48 : x
  2. Step 2: Convert to fraction form
    138,670.88/208,001.28 = 49,904.48/x
  3. Step 3: Cross multiply
    138,670.88x = 208,001.28 × 49,904.48
  4. Step 4: Simplify right side
    138,670.88x = 10,380,195,717.73
  5. Step 5: Solve for x
    x = 10,380,195,717.73/138,670.88
  6. Step 6: Final answer
    x = 74,854.91

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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.