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Finding the Fourth Proportional to 95.10, 130.70 and 76.64

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Solution

The fourth proportional to 95.10, 130.70 and 76.64 is: 105.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.10 : 130.70 = 76.64 : x
  2. Step 2: Convert to fraction form
    95.10/130.70 = 76.64/x
  3. Step 3: Cross multiply
    95.10x = 130.70 × 76.64
  4. Step 4: Simplify right side
    95.10x = 10,016.85
  5. Step 5: Solve for x
    x = 10,016.85/95.10
  6. Step 6: Final answer
    x = 105.33

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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.