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Finding the Fourth Proportional to 197.12, 271.98 and 131.66

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Solution

The fourth proportional to 197.12, 271.98 and 131.66 is: 181.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.12 : 271.98 = 131.66 : x
  2. Step 2: Convert to fraction form
    197.12/271.98 = 131.66/x
  3. Step 3: Cross multiply
    197.12x = 271.98 × 131.66
  4. Step 4: Simplify right side
    197.12x = 35,808.89
  5. Step 5: Solve for x
    x = 35,808.89/197.12
  6. Step 6: Final answer
    x = 181.66

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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.