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Finding the Fourth Proportional to 138,668.76, 191,469.42 and 114,932.52

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Solution

The fourth proportional to 138,668.76, 191,469.42 and 114,932.52 is: 158,695.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,668.76 : 191,469.42 = 114,932.52 : x
  2. Step 2: Convert to fraction form
    138,668.76/191,469.42 = 114,932.52/x
  3. Step 3: Cross multiply
    138,668.76x = 191,469.42 × 114,932.52
  4. Step 4: Simplify right side
    138,668.76x = 22,006,062,943.54
  5. Step 5: Solve for x
    x = 22,006,062,943.54/138,668.76
  6. Step 6: Final answer
    x = 158,695.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.