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Finding the Fourth Proportional to 281,102.92, 421,654.37 and 81,423.36

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Solution

The fourth proportional to 281,102.92, 421,654.37 and 81,423.36 is: 122,135.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,102.92 : 421,654.37 = 81,423.36 : x
  2. Step 2: Convert to fraction form
    281,102.92/421,654.37 = 81,423.36/x
  3. Step 3: Cross multiply
    281,102.92x = 421,654.37 × 81,423.36
  4. Step 4: Simplify right side
    281,102.92x = 34,332,515,156.97
  5. Step 5: Solve for x
    x = 34,332,515,156.97/281,102.92
  6. Step 6: Final answer
    x = 122,135.04

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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.