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Finding the Fourth Proportional to 197.21, 272.18 and 114.32

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Solution

The fourth proportional to 197.21, 272.18 and 114.32 is: 157.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.21 : 272.18 = 114.32 : x
  2. Step 2: Convert to fraction form
    197.21/272.18 = 114.32/x
  3. Step 3: Cross multiply
    197.21x = 272.18 × 114.32
  4. Step 4: Simplify right side
    197.21x = 31,115.05
  5. Step 5: Solve for x
    x = 31,115.05/197.21
  6. Step 6: Final answer
    x = 157.78

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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.