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Finding the Fourth Proportional to 197.42, 272.42 and 114.55

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Solution

The fourth proportional to 197.42, 272.42 and 114.55 is: 158.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.42 : 272.42 = 114.55 : x
  2. Step 2: Convert to fraction form
    197.42/272.42 = 114.55/x
  3. Step 3: Cross multiply
    197.42x = 272.42 × 114.55
  4. Step 4: Simplify right side
    197.42x = 31,205.14
  5. Step 5: Solve for x
    x = 31,205.14/197.42
  6. Step 6: Final answer
    x = 158.06

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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.