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Finding the Fourth Proportional to 138,873.66, 208,901.79 and 125,882.90

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Solution

The fourth proportional to 138,873.66, 208,901.79 and 125,882.90 is: 189,360.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,873.66 : 208,901.79 = 125,882.90 : x
  2. Step 2: Convert to fraction form
    138,873.66/208,901.79 = 125,882.90/x
  3. Step 3: Cross multiply
    138,873.66x = 208,901.79 × 125,882.90
  4. Step 4: Simplify right side
    138,873.66x = 26,297,163,140.39
  5. Step 5: Solve for x
    x = 26,297,163,140.39/138,873.66
  6. Step 6: Final answer
    x = 189,360.34

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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.