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Finding the Fourth Proportional to 95.28, 142.22 and 85.56

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Solution

The fourth proportional to 95.28, 142.22 and 85.56 is: 127.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.28 : 142.22 = 85.56 : x
  2. Step 2: Convert to fraction form
    95.28/142.22 = 85.56/x
  3. Step 3: Cross multiply
    95.28x = 142.22 × 85.56
  4. Step 4: Simplify right side
    95.28x = 12,167.92
  5. Step 5: Solve for x
    x = 12,167.92/95.28
  6. Step 6: Final answer
    x = 127.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.