Home / 65,979.38-91,049.31-39,105.92

Finding the Fourth Proportional to 65,979.38, 91,049.31 and 39,105.92

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Solution

The fourth proportional to 65,979.38, 91,049.31 and 39,105.92 is: 53,964.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,979.38 : 91,049.31 = 39,105.92 : x
  2. Step 2: Convert to fraction form
    65,979.38/91,049.31 = 39,105.92/x
  3. Step 3: Cross multiply
    65,979.38x = 91,049.31 × 39,105.92
  4. Step 4: Simplify right side
    65,979.38x = 3,560,567,260.54
  5. Step 5: Solve for x
    x = 3,560,567,260.54/65,979.38
  6. Step 6: Final answer
    x = 53,964.85

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1.5x scale

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.