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Finding the Fourth Proportional to 196.53, 271.13 and 126.57

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Solution

The fourth proportional to 196.53, 271.13 and 126.57 is: 174.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.53 : 271.13 = 126.57 : x
  2. Step 2: Convert to fraction form
    196.53/271.13 = 126.57/x
  3. Step 3: Cross multiply
    196.53x = 271.13 × 126.57
  4. Step 4: Simplify right side
    196.53x = 34,315.78
  5. Step 5: Solve for x
    x = 34,315.78/196.53
  6. Step 6: Final answer
    x = 174.60

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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.