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Finding the Fourth Proportional to 133.80, 200.55 and 79.62

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Solution

The fourth proportional to 133.80, 200.55 and 79.62 is: 119.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.80 : 200.55 = 79.62 : x
  2. Step 2: Convert to fraction form
    133.80/200.55 = 79.62/x
  3. Step 3: Cross multiply
    133.80x = 200.55 × 79.62
  4. Step 4: Simplify right side
    133.80x = 15,967.79
  5. Step 5: Solve for x
    x = 15,967.79/133.80
  6. Step 6: Final answer
    x = 119.34

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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.