Home / 81,673.38-123,116.07-74,578.86

Finding the Fourth Proportional to 81,673.38, 123,116.07 and 74,578.86

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Solution

The fourth proportional to 81,673.38, 123,116.07 and 74,578.86 is: 112,421.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,673.38 : 123,116.07 = 74,578.86 : x
  2. Step 2: Convert to fraction form
    81,673.38/123,116.07 = 74,578.86/x
  3. Step 3: Cross multiply
    81,673.38x = 123,116.07 × 74,578.86
  4. Step 4: Simplify right side
    81,673.38x = 9,181,856,008.44
  5. Step 5: Solve for x
    x = 9,181,856,008.44/81,673.38
  6. Step 6: Final answer
    x = 112,421.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.