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Finding the Fourth Proportional to 85.34, 127.85 and 41.96

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Solution

The fourth proportional to 85.34, 127.85 and 41.96 is: 62.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85.34 : 127.85 = 41.96 : x
  2. Step 2: Convert to fraction form
    85.34/127.85 = 41.96/x
  3. Step 3: Cross multiply
    85.34x = 127.85 × 41.96
  4. Step 4: Simplify right side
    85.34x = 5,363.74
  5. Step 5: Solve for x
    x = 5,363.74/85.34
  6. Step 6: Final answer
    x = 62.86

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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.