Home / 129,787.92-194,383.80-82,399.68

Finding the Fourth Proportional to 129,787.92, 194,383.80 and 82,399.68

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Solution

The fourth proportional to 129,787.92, 194,383.80 and 82,399.68 is: 123,410.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,787.92 : 194,383.80 = 82,399.68 : x
  2. Step 2: Convert to fraction form
    129,787.92/194,383.80 = 82,399.68/x
  3. Step 3: Cross multiply
    129,787.92x = 194,383.80 × 82,399.68
  4. Step 4: Simplify right side
    129,787.92x = 16,017,162,917.18
  5. Step 5: Solve for x
    x = 16,017,162,917.18/129,787.92
  6. Step 6: Final answer
    x = 123,410.28

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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.