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Finding the Fourth Proportional to 196.09, 294.14 and 87.86

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Solution

The fourth proportional to 196.09, 294.14 and 87.86 is: 131.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.09 : 294.14 = 87.86 : x
  2. Step 2: Convert to fraction form
    196.09/294.14 = 87.86/x
  3. Step 3: Cross multiply
    196.09x = 294.14 × 87.86
  4. Step 4: Simplify right side
    196.09x = 25,841.56
  5. Step 5: Solve for x
    x = 25,841.56/196.09
  6. Step 6: Final answer
    x = 131.78

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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.