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Finding the Fourth Proportional to 133.98, 200.72 and 112.45

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Solution

The fourth proportional to 133.98, 200.72 and 112.45 is: 168.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.98 : 200.72 = 112.45 : x
  2. Step 2: Convert to fraction form
    133.98/200.72 = 112.45/x
  3. Step 3: Cross multiply
    133.98x = 200.72 × 112.45
  4. Step 4: Simplify right side
    133.98x = 22,571.12
  5. Step 5: Solve for x
    x = 22,571.12/133.98
  6. Step 6: Final answer
    x = 168.47

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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.