Home / 129,780.50-178,934.82-108,301.19

Finding the Fourth Proportional to 129,780.50, 178,934.82 and 108,301.19

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Solution

The fourth proportional to 129,780.50, 178,934.82 and 108,301.19 is: 149,320.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,780.50 : 178,934.82 = 108,301.19 : x
  2. Step 2: Convert to fraction form
    129,780.50/178,934.82 = 108,301.19/x
  3. Step 3: Cross multiply
    129,780.50x = 178,934.82 × 108,301.19
  4. Step 4: Simplify right side
    129,780.50x = 19,378,853,938.44
  5. Step 5: Solve for x
    x = 19,378,853,938.44/129,780.50
  6. Step 6: Final answer
    x = 149,320.23

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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.