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Finding the Fourth Proportional to 133.80, 200.43 and 79.53

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Solution

The fourth proportional to 133.80, 200.43 and 79.53 is: 119.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.80 : 200.43 = 79.53 : x
  2. Step 2: Convert to fraction form
    133.80/200.43 = 79.53/x
  3. Step 3: Cross multiply
    133.80x = 200.43 × 79.53
  4. Step 4: Simplify right side
    133.80x = 15,940.20
  5. Step 5: Solve for x
    x = 15,940.20/133.80
  6. Step 6: Final answer
    x = 119.13

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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.