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Finding the Fourth Proportional to 97.88, 147.22 and 82.76

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Solution

The fourth proportional to 97.88, 147.22 and 82.76 is: 124.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.88 : 147.22 = 82.76 : x
  2. Step 2: Convert to fraction form
    97.88/147.22 = 82.76/x
  3. Step 3: Cross multiply
    97.88x = 147.22 × 82.76
  4. Step 4: Simplify right side
    97.88x = 12,183.93
  5. Step 5: Solve for x
    x = 12,183.93/97.88
  6. Step 6: Final answer
    x = 124.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.