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Finding the Fourth Proportional to 95.45, 131.37 and 79.73

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Solution

The fourth proportional to 95.45, 131.37 and 79.73 is: 109.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.45 : 131.37 = 79.73 : x
  2. Step 2: Convert to fraction form
    95.45/131.37 = 79.73/x
  3. Step 3: Cross multiply
    95.45x = 131.37 × 79.73
  4. Step 4: Simplify right side
    95.45x = 10,474.12
  5. Step 5: Solve for x
    x = 10,474.12/95.45
  6. Step 6: Final answer
    x = 109.74

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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.