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Finding the Fourth Proportional to 197.54, 272.60 and 118.86

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Solution

The fourth proportional to 197.54, 272.60 and 118.86 is: 164.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.54 : 272.60 = 118.86 : x
  2. Step 2: Convert to fraction form
    197.54/272.60 = 118.86/x
  3. Step 3: Cross multiply
    197.54x = 272.60 × 118.86
  4. Step 4: Simplify right side
    197.54x = 32,400.64
  5. Step 5: Solve for x
    x = 32,400.64/197.54
  6. Step 6: Final answer
    x = 164.02

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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.