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Finding the Fourth Proportional to 196.79, 271.56 and 108.27

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Solution

The fourth proportional to 196.79, 271.56 and 108.27 is: 149.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.79 : 271.56 = 108.27 : x
  2. Step 2: Convert to fraction form
    196.79/271.56 = 108.27/x
  3. Step 3: Cross multiply
    196.79x = 271.56 × 108.27
  4. Step 4: Simplify right side
    196.79x = 29,402.21
  5. Step 5: Solve for x
    x = 29,402.21/196.79
  6. Step 6: Final answer
    x = 149.41

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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.