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Finding the Fourth Proportional to 196.11, 270.64 and 113.20

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Solution

The fourth proportional to 196.11, 270.64 and 113.20 is: 156.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.11 : 270.64 = 113.20 : x
  2. Step 2: Convert to fraction form
    196.11/270.64 = 113.20/x
  3. Step 3: Cross multiply
    196.11x = 270.64 × 113.20
  4. Step 4: Simplify right side
    196.11x = 30,635.49
  5. Step 5: Solve for x
    x = 30,635.49/196.11
  6. Step 6: Final answer
    x = 156.22

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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.