Home / 129,591.43-178,896.21-91,382.11

Finding the Fourth Proportional to 129,591.43, 178,896.21 and 91,382.11

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Solution

The fourth proportional to 129,591.43, 178,896.21 and 91,382.11 is: 126,149.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,591.43 : 178,896.21 = 91,382.11 : x
  2. Step 2: Convert to fraction form
    129,591.43/178,896.21 = 91,382.11/x
  3. Step 3: Cross multiply
    129,591.43x = 178,896.21 × 91,382.11
  4. Step 4: Simplify right side
    129,591.43x = 16,347,913,140.80
  5. Step 5: Solve for x
    x = 16,347,913,140.80/129,591.43
  6. Step 6: Final answer
    x = 126,149.65

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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.