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Finding the Fourth Proportional to 197.18, 295.59 and 81.55

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Solution

The fourth proportional to 197.18, 295.59 and 81.55 is: 122.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.18 : 295.59 = 81.55 : x
  2. Step 2: Convert to fraction form
    197.18/295.59 = 81.55/x
  3. Step 3: Cross multiply
    197.18x = 295.59 × 81.55
  4. Step 4: Simplify right side
    197.18x = 24,104.98
  5. Step 5: Solve for x
    x = 24,104.98/197.18
  6. Step 6: Final answer
    x = 122.25

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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.