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Finding the Fourth Proportional to 80,558.70, 111,202 and 53,691.42

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Solution

The fourth proportional to 80,558.70, 111,202 and 53,691.42 is: 74,114.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,558.70 : 111,202 = 53,691.42 : x
  2. Step 2: Convert to fraction form
    80,558.70/111,202 = 53,691.42/x
  3. Step 3: Cross multiply
    80,558.70x = 111,202 × 53,691.42
  4. Step 4: Simplify right side
    80,558.70x = 5,970,593,286.84
  5. Step 5: Solve for x
    x = 5,970,593,286.84/80,558.70
  6. Step 6: Final answer
    x = 74,114.82

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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.