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Finding the Fourth Proportional to 95.25, 130.49 and 91.79

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Solution

The fourth proportional to 95.25, 130.49 and 91.79 is: 125.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.25 : 130.49 = 91.79 : x
  2. Step 2: Convert to fraction form
    95.25/130.49 = 91.79/x
  3. Step 3: Cross multiply
    95.25x = 130.49 × 91.79
  4. Step 4: Simplify right side
    95.25x = 11,976.57
  5. Step 5: Solve for x
    x = 11,976.57/95.25
  6. Step 6: Final answer
    x = 125.74

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.