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Finding the Fourth Proportional to 196.67, 271.38 and 109.36

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Solution

The fourth proportional to 196.67, 271.38 and 109.36 is: 150.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.67 : 271.38 = 109.36 : x
  2. Step 2: Convert to fraction form
    196.67/271.38 = 109.36/x
  3. Step 3: Cross multiply
    196.67x = 271.38 × 109.36
  4. Step 4: Simplify right side
    196.67x = 29,678.87
  5. Step 5: Solve for x
    x = 29,678.87/196.67
  6. Step 6: Final answer
    x = 150.91

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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.