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Finding the Fourth Proportional to 197.19, 295.57 and 81.60

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Solution

The fourth proportional to 197.19, 295.57 and 81.60 is: 122.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.19 : 295.57 = 81.60 : x
  2. Step 2: Convert to fraction form
    197.19/295.57 = 81.60/x
  3. Step 3: Cross multiply
    197.19x = 295.57 × 81.60
  4. Step 4: Simplify right side
    197.19x = 24,118.10
  5. Step 5: Solve for x
    x = 24,118.10/197.19
  6. Step 6: Final answer
    x = 122.31

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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.