Home / 80,642.12-111,335.85-51,971.90

Finding the Fourth Proportional to 80,642.12, 111,335.85 and 51,971.90

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Solution

The fourth proportional to 80,642.12, 111,335.85 and 51,971.90 is: 71,753.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,642.12 : 111,335.85 = 51,971.90 : x
  2. Step 2: Convert to fraction form
    80,642.12/111,335.85 = 51,971.90/x
  3. Step 3: Cross multiply
    80,642.12x = 111,335.85 × 51,971.90
  4. Step 4: Simplify right side
    80,642.12x = 5,786,335,105.94
  5. Step 5: Solve for x
    x = 5,786,335,105.94/80,642.12
  6. Step 6: Final answer
    x = 71,753.27

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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.