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Finding the Fourth Proportional to 69.24, 95.55 and 39.73

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Solution

The fourth proportional to 69.24, 95.55 and 39.73 is: 54.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.24 : 95.55 = 39.73 : x
  2. Step 2: Convert to fraction form
    69.24/95.55 = 39.73/x
  3. Step 3: Cross multiply
    69.24x = 95.55 × 39.73
  4. Step 4: Simplify right side
    69.24x = 3,796.74
  5. Step 5: Solve for x
    x = 3,796.74/69.24
  6. Step 6: Final answer
    x = 54.84

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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.