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Finding the Fourth Proportional to 196.42, 271.18 and 126.58

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Solution

The fourth proportional to 196.42, 271.18 and 126.58 is: 174.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.42 : 271.18 = 126.58 : x
  2. Step 2: Convert to fraction form
    196.42/271.18 = 126.58/x
  3. Step 3: Cross multiply
    196.42x = 271.18 × 126.58
  4. Step 4: Simplify right side
    196.42x = 34,325.96
  5. Step 5: Solve for x
    x = 34,325.96/196.42
  6. Step 6: Final answer
    x = 174.76

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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.