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Finding the Fourth Proportional to 95.70, 131.70 and 80.12

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Solution

The fourth proportional to 95.70, 131.70 and 80.12 is: 110.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.70 : 131.70 = 80.12 : x
  2. Step 2: Convert to fraction form
    95.70/131.70 = 80.12/x
  3. Step 3: Cross multiply
    95.70x = 131.70 × 80.12
  4. Step 4: Simplify right side
    95.70x = 10,551.80
  5. Step 5: Solve for x
    x = 10,551.80/95.70
  6. Step 6: Final answer
    x = 110.26

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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.