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Finding the Fourth Proportional to 95.10, 141.96 and 85.92

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Solution

The fourth proportional to 95.10, 141.96 and 85.92 is: 128.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.10 : 141.96 = 85.92 : x
  2. Step 2: Convert to fraction form
    95.10/141.96 = 85.92/x
  3. Step 3: Cross multiply
    95.10x = 141.96 × 85.92
  4. Step 4: Simplify right side
    95.10x = 12,197.20
  5. Step 5: Solve for x
    x = 12,197.20/95.10
  6. Step 6: Final answer
    x = 128.26

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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.