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Finding the Fourth Proportional to 131,979.79, 198,101.49 and 72,843.31

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Solution

The fourth proportional to 131,979.79, 198,101.49 and 72,843.31 is: 109,337.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,979.79 : 198,101.49 = 72,843.31 : x
  2. Step 2: Convert to fraction form
    131,979.79/198,101.49 = 72,843.31/x
  3. Step 3: Cross multiply
    131,979.79x = 198,101.49 × 72,843.31
  4. Step 4: Simplify right side
    131,979.79x = 14,430,368,247.53
  5. Step 5: Solve for x
    x = 14,430,368,247.53/131,979.79
  6. Step 6: Final answer
    x = 109,337.71

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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.