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Finding the Fourth Proportional to 80,958.30, 111,691.89 and 80,833.56

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Solution

The fourth proportional to 80,958.30, 111,691.89 and 80,833.56 is: 111,519.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,958.30 : 111,691.89 = 80,833.56 : x
  2. Step 2: Convert to fraction form
    80,958.30/111,691.89 = 80,833.56/x
  3. Step 3: Cross multiply
    80,958.30x = 111,691.89 × 80,833.56
  4. Step 4: Simplify right side
    80,958.30x = 9,028,453,091.83
  5. Step 5: Solve for x
    x = 9,028,453,091.83/80,958.30
  6. Step 6: Final answer
    x = 111,519.80

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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.