Home / 129,310.29-178,472.70-80,934.66

Finding the Fourth Proportional to 129,310.29, 178,472.70 and 80,934.66

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Solution

The fourth proportional to 129,310.29, 178,472.70 and 80,934.66 is: 111,705.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,310.29 : 178,472.70 = 80,934.66 : x
  2. Step 2: Convert to fraction form
    129,310.29/178,472.70 = 80,934.66/x
  3. Step 3: Cross multiply
    129,310.29x = 178,472.70 × 80,934.66
  4. Step 4: Simplify right side
    129,310.29x = 14,444,627,293.78
  5. Step 5: Solve for x
    x = 14,444,627,293.78/129,310.29
  6. Step 6: Final answer
    x = 111,705.17

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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.