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Finding the Fourth Proportional to 95.57, 131.55 and 79.85

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Solution

The fourth proportional to 95.57, 131.55 and 79.85 is: 109.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.57 : 131.55 = 79.85 : x
  2. Step 2: Convert to fraction form
    95.57/131.55 = 79.85/x
  3. Step 3: Cross multiply
    95.57x = 131.55 × 79.85
  4. Step 4: Simplify right side
    95.57x = 10,504.40
  5. Step 5: Solve for x
    x = 10,504.40/95.57
  6. Step 6: Final answer
    x = 109.91

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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.