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Finding the Fourth Proportional to 148,489.78, 204,917.30 and 80,506.57

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Solution

The fourth proportional to 148,489.78, 204,917.30 and 80,506.57 is: 111,099.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,489.78 : 204,917.30 = 80,506.57 : x
  2. Step 2: Convert to fraction form
    148,489.78/204,917.30 = 80,506.57/x
  3. Step 3: Cross multiply
    148,489.78x = 204,917.30 × 80,506.57
  4. Step 4: Simplify right side
    148,489.78x = 16,497,188,956.66
  5. Step 5: Solve for x
    x = 16,497,188,956.66/148,489.78
  6. Step 6: Final answer
    x = 111,099.83

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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.