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Finding the Fourth Proportional to 95.10, 142.47 and 71.16

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Solution

The fourth proportional to 95.10, 142.47 and 71.16 is: 106.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.10 : 142.47 = 71.16 : x
  2. Step 2: Convert to fraction form
    95.10/142.47 = 71.16/x
  3. Step 3: Cross multiply
    95.10x = 142.47 × 71.16
  4. Step 4: Simplify right side
    95.10x = 10,138.17
  5. Step 5: Solve for x
    x = 10,138.17/95.10
  6. Step 6: Final answer
    x = 106.61

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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.