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Finding the Fourth Proportional to 95.22, 142.70 and 80.87

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Solution

The fourth proportional to 95.22, 142.70 and 80.87 is: 121.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.22 : 142.70 = 80.87 : x
  2. Step 2: Convert to fraction form
    95.22/142.70 = 80.87/x
  3. Step 3: Cross multiply
    95.22x = 142.70 × 80.87
  4. Step 4: Simplify right side
    95.22x = 11,539.03
  5. Step 5: Solve for x
    x = 11,539.03/95.22
  6. Step 6: Final answer
    x = 121.18

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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.