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Finding the Fourth Proportional to 69.20, 95.48 and 38.11

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Solution

The fourth proportional to 69.20, 95.48 and 38.11 is: 52.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.20 : 95.48 = 38.11 : x
  2. Step 2: Convert to fraction form
    69.20/95.48 = 38.11/x
  3. Step 3: Cross multiply
    69.20x = 95.48 × 38.11
  4. Step 4: Simplify right side
    69.20x = 3,638.60
  5. Step 5: Solve for x
    x = 3,638.60/69.20
  6. Step 6: Final answer
    x = 52.58

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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.