Home / 87,382.33-120,338.06-78,694.54

Finding the Fourth Proportional to 87,382.33, 120,338.06 and 78,694.54

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Solution

The fourth proportional to 87,382.33, 120,338.06 and 78,694.54 is: 108,373.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,382.33 : 120,338.06 = 78,694.54 : x
  2. Step 2: Convert to fraction form
    87,382.33/120,338.06 = 78,694.54/x
  3. Step 3: Cross multiply
    87,382.33x = 120,338.06 × 78,694.54
  4. Step 4: Simplify right side
    87,382.33x = 9,469,947,581.87
  5. Step 5: Solve for x
    x = 9,469,947,581.87/87,382.33
  6. Step 6: Final answer
    x = 108,373.72

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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.