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Finding the Fourth Proportional to 196.22, 294.12 and 87.86

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Solution

The fourth proportional to 196.22, 294.12 and 87.86 is: 131.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.22 : 294.12 = 87.86 : x
  2. Step 2: Convert to fraction form
    196.22/294.12 = 87.86/x
  3. Step 3: Cross multiply
    196.22x = 294.12 × 87.86
  4. Step 4: Simplify right side
    196.22x = 25,841.38
  5. Step 5: Solve for x
    x = 25,841.38/196.22
  6. Step 6: Final answer
    x = 131.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.