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Finding the Fourth Proportional to 231,660.20, 319,721.20 and 129,724.48

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Solution

The fourth proportional to 231,660.20, 319,721.20 and 129,724.48 is: 179,036.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,660.20 : 319,721.20 = 129,724.48 : x
  2. Step 2: Convert to fraction form
    231,660.20/319,721.20 = 129,724.48/x
  3. Step 3: Cross multiply
    231,660.20x = 319,721.20 × 129,724.48
  4. Step 4: Simplify right side
    231,660.20x = 41,475,666,414.98
  5. Step 5: Solve for x
    x = 41,475,666,414.98/231,660.20
  6. Step 6: Final answer
    x = 179,036.65

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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.