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Finding the Fourth Proportional to 196.87, 271.68 and 108.35

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Solution

The fourth proportional to 196.87, 271.68 and 108.35 is: 149.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.87 : 271.68 = 108.35 : x
  2. Step 2: Convert to fraction form
    196.87/271.68 = 108.35/x
  3. Step 3: Cross multiply
    196.87x = 271.68 × 108.35
  4. Step 4: Simplify right side
    196.87x = 29,436.19
  5. Step 5: Solve for x
    x = 29,436.19/196.87
  6. Step 6: Final answer
    x = 149.52

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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.