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Finding the Fourth Proportional to 95.11, 131.02 and 85.21

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Solution

The fourth proportional to 95.11, 131.02 and 85.21 is: 117.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.11 : 131.02 = 85.21 : x
  2. Step 2: Convert to fraction form
    95.11/131.02 = 85.21/x
  3. Step 3: Cross multiply
    95.11x = 131.02 × 85.21
  4. Step 4: Simplify right side
    95.11x = 11,164.21
  5. Step 5: Solve for x
    x = 11,164.21/95.11
  6. Step 6: Final answer
    x = 117.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.