Home / 129,439.14-194,123.10-81,983.04

Finding the Fourth Proportional to 129,439.14, 194,123.10 and 81,983.04

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Solution

The fourth proportional to 129,439.14, 194,123.10 and 81,983.04 is: 122,952.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,439.14 : 194,123.10 = 81,983.04 : x
  2. Step 2: Convert to fraction form
    129,439.14/194,123.10 = 81,983.04/x
  3. Step 3: Cross multiply
    129,439.14x = 194,123.10 × 81,983.04
  4. Step 4: Simplify right side
    129,439.14x = 15,914,801,872.22
  5. Step 5: Solve for x
    x = 15,914,801,872.22/129,439.14
  6. Step 6: Final answer
    x = 122,952.01

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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.