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Finding the Fourth Proportional to 80,975.55, 111,699.49 and 48,687.75

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Solution

The fourth proportional to 80,975.55, 111,699.49 and 48,687.75 is: 67,160.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,975.55 : 111,699.49 = 48,687.75 : x
  2. Step 2: Convert to fraction form
    80,975.55/111,699.49 = 48,687.75/x
  3. Step 3: Cross multiply
    80,975.55x = 111,699.49 × 48,687.75
  4. Step 4: Simplify right side
    80,975.55x = 5,438,396,239.88
  5. Step 5: Solve for x
    x = 5,438,396,239.88/80,975.55
  6. Step 6: Final answer
    x = 67,160.96

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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.