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Finding the Fourth Proportional to 196.70, 271.46 and 108.19

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Solution

The fourth proportional to 196.70, 271.46 and 108.19 is: 149.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.70 : 271.46 = 108.19 : x
  2. Step 2: Convert to fraction form
    196.70/271.46 = 108.19/x
  3. Step 3: Cross multiply
    196.70x = 271.46 × 108.19
  4. Step 4: Simplify right side
    196.70x = 29,369.27
  5. Step 5: Solve for x
    x = 29,369.27/196.70
  6. Step 6: Final answer
    x = 149.31

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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.