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Finding the Fourth Proportional to 140,103.92, 193,354.88 and 79,693.48

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Solution

The fourth proportional to 140,103.92, 193,354.88 and 79,693.48 is: 109,983.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,103.92 : 193,354.88 = 79,693.48 : x
  2. Step 2: Convert to fraction form
    140,103.92/193,354.88 = 79,693.48/x
  3. Step 3: Cross multiply
    140,103.92x = 193,354.88 × 79,693.48
  4. Step 4: Simplify right side
    140,103.92x = 15,409,123,262.18
  5. Step 5: Solve for x
    x = 15,409,123,262.18/140,103.92
  6. Step 6: Final answer
    x = 109,983.53

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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.