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Finding the Fourth Proportional to 196.76, 271.51 and 112.74

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Solution

The fourth proportional to 196.76, 271.51 and 112.74 is: 155.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.76 : 271.51 = 112.74 : x
  2. Step 2: Convert to fraction form
    196.76/271.51 = 112.74/x
  3. Step 3: Cross multiply
    196.76x = 271.51 × 112.74
  4. Step 4: Simplify right side
    196.76x = 30,610.58
  5. Step 5: Solve for x
    x = 30,610.58/196.76
  6. Step 6: Final answer
    x = 155.58

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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.