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Finding the Fourth Proportional to 80,809.92, 111,451.68 and 67,839.12

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Solution

The fourth proportional to 80,809.92, 111,451.68 and 67,839.12 is: 93,562.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,809.92 : 111,451.68 = 67,839.12 : x
  2. Step 2: Convert to fraction form
    80,809.92/111,451.68 = 67,839.12/x
  3. Step 3: Cross multiply
    80,809.92x = 111,451.68 × 67,839.12
  4. Step 4: Simplify right side
    80,809.92x = 7,560,783,893.72
  5. Step 5: Solve for x
    x = 7,560,783,893.72/80,809.92
  6. Step 6: Final answer
    x = 93,562.57

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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.