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Finding the Fourth Proportional to 113.89, 170.86 and 41.85

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Solution

The fourth proportional to 113.89, 170.86 and 41.85 is: 62.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.89 : 170.86 = 41.85 : x
  2. Step 2: Convert to fraction form
    113.89/170.86 = 41.85/x
  3. Step 3: Cross multiply
    113.89x = 170.86 × 41.85
  4. Step 4: Simplify right side
    113.89x = 7,150.28
  5. Step 5: Solve for x
    x = 7,150.28/113.89
  6. Step 6: Final answer
    x = 62.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.