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Finding the Fourth Proportional to 196.85, 271.73 and 131.33

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Solution

The fourth proportional to 196.85, 271.73 and 131.33 is: 181.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.85 : 271.73 = 131.33 : x
  2. Step 2: Convert to fraction form
    196.85/271.73 = 131.33/x
  3. Step 3: Cross multiply
    196.85x = 271.73 × 131.33
  4. Step 4: Simplify right side
    196.85x = 35,685.80
  5. Step 5: Solve for x
    x = 35,685.80/196.85
  6. Step 6: Final answer
    x = 181.29

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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.