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Finding the Fourth Proportional to 197.18, 272.07 and 109.83

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Solution

The fourth proportional to 197.18, 272.07 and 109.83 is: 151.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.18 : 272.07 = 109.83 : x
  2. Step 2: Convert to fraction form
    197.18/272.07 = 109.83/x
  3. Step 3: Cross multiply
    197.18x = 272.07 × 109.83
  4. Step 4: Simplify right side
    197.18x = 29,881.45
  5. Step 5: Solve for x
    x = 29,881.45/197.18
  6. Step 6: Final answer
    x = 151.55

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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.