Home / 82,115.38-123,173.07-19,785.88

Finding the Fourth Proportional to 82,115.38, 123,173.07 and 19,785.88

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Solution

The fourth proportional to 82,115.38, 123,173.07 and 19,785.88 is: 29,678.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,115.38 : 123,173.07 = 19,785.88 : x
  2. Step 2: Convert to fraction form
    82,115.38/123,173.07 = 19,785.88/x
  3. Step 3: Cross multiply
    82,115.38x = 123,173.07 × 19,785.88
  4. Step 4: Simplify right side
    82,115.38x = 2,437,087,582.25
  5. Step 5: Solve for x
    x = 2,437,087,582.25/82,115.38
  6. Step 6: Final answer
    x = 29,678.82

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1.5x scale

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.