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Finding the Fourth Proportional to 95.62, 142.85 and 80.25

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Solution

The fourth proportional to 95.62, 142.85 and 80.25 is: 119.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.62 : 142.85 = 80.25 : x
  2. Step 2: Convert to fraction form
    95.62/142.85 = 80.25/x
  3. Step 3: Cross multiply
    95.62x = 142.85 × 80.25
  4. Step 4: Simplify right side
    95.62x = 11,463.71
  5. Step 5: Solve for x
    x = 11,463.71/95.62
  6. Step 6: Final answer
    x = 119.89

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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.