Home / 129,586.43-178,889.31-91,377.11

Finding the Fourth Proportional to 129,586.43, 178,889.31 and 91,377.11

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Solution

The fourth proportional to 129,586.43, 178,889.31 and 91,377.11 is: 126,142.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,586.43 : 178,889.31 = 91,377.11 : x
  2. Step 2: Convert to fraction form
    129,586.43/178,889.31 = 91,377.11/x
  3. Step 3: Cross multiply
    129,586.43x = 178,889.31 × 91,377.11
  4. Step 4: Simplify right side
    129,586.43x = 16,346,388,604.92
  5. Step 5: Solve for x
    x = 16,346,388,604.92/129,586.43
  6. Step 6: Final answer
    x = 126,142.75

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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.