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Finding the Fourth Proportional to 133.46, 200.20 and 79.34

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Solution

The fourth proportional to 133.46, 200.20 and 79.34 is: 119.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.46 : 200.20 = 79.34 : x
  2. Step 2: Convert to fraction form
    133.46/200.20 = 79.34/x
  3. Step 3: Cross multiply
    133.46x = 200.20 × 79.34
  4. Step 4: Simplify right side
    133.46x = 15,883.87
  5. Step 5: Solve for x
    x = 15,883.87/133.46
  6. Step 6: Final answer
    x = 119.02

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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.