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Finding the Fourth Proportional to 196.34, 270.90 and 113.45

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Solution

The fourth proportional to 196.34, 270.90 and 113.45 is: 156.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.34 : 270.90 = 113.45 : x
  2. Step 2: Convert to fraction form
    196.34/270.90 = 113.45/x
  3. Step 3: Cross multiply
    196.34x = 270.90 × 113.45
  4. Step 4: Simplify right side
    196.34x = 30,732.25
  5. Step 5: Solve for x
    x = 30,732.25/196.34
  6. Step 6: Final answer
    x = 156.53

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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.