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Finding the Fourth Proportional to 196.87, 271.65 and 118.24

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Solution

The fourth proportional to 196.87, 271.65 and 118.24 is: 163.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.87 : 271.65 = 118.24 : x
  2. Step 2: Convert to fraction form
    196.87/271.65 = 118.24/x
  3. Step 3: Cross multiply
    196.87x = 271.65 × 118.24
  4. Step 4: Simplify right side
    196.87x = 32,119.90
  5. Step 5: Solve for x
    x = 32,119.90/196.87
  6. Step 6: Final answer
    x = 163.15

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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.