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Finding the Fourth Proportional to 201.49, 301.96 and 79.68

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Solution

The fourth proportional to 201.49, 301.96 and 79.68 is: 119.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.49 : 301.96 = 79.68 : x
  2. Step 2: Convert to fraction form
    201.49/301.96 = 79.68/x
  3. Step 3: Cross multiply
    201.49x = 301.96 × 79.68
  4. Step 4: Simplify right side
    201.49x = 24,061.40
  5. Step 5: Solve for x
    x = 24,061.40/201.49
  6. Step 6: Final answer
    x = 119.42

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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.