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Finding the Fourth Proportional to 196.71, 271.50 and 126.76

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Solution

The fourth proportional to 196.71, 271.50 and 126.76 is: 174.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.71 : 271.50 = 126.76 : x
  2. Step 2: Convert to fraction form
    196.71/271.50 = 126.76/x
  3. Step 3: Cross multiply
    196.71x = 271.50 × 126.76
  4. Step 4: Simplify right side
    196.71x = 34,413.35
  5. Step 5: Solve for x
    x = 34,413.35/196.71
  6. Step 6: Final answer
    x = 174.94

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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.