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Finding the Fourth Proportional to 95.68, 131.90 and 91.13

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Solution

The fourth proportional to 95.68, 131.90 and 91.13 is: 125.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.68 : 131.90 = 91.13 : x
  2. Step 2: Convert to fraction form
    95.68/131.90 = 91.13/x
  3. Step 3: Cross multiply
    95.68x = 131.90 × 91.13
  4. Step 4: Simplify right side
    95.68x = 12,019.70
  5. Step 5: Solve for x
    x = 12,019.70/95.68
  6. Step 6: Final answer
    x = 125.62

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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.