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Finding the Fourth Proportional to 133.45, 199.21 and 112.94

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Solution

The fourth proportional to 133.45, 199.21 and 112.94 is: 168.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.45 : 199.21 = 112.94 : x
  2. Step 2: Convert to fraction form
    133.45/199.21 = 112.94/x
  3. Step 3: Cross multiply
    133.45x = 199.21 × 112.94
  4. Step 4: Simplify right side
    133.45x = 22,499.58
  5. Step 5: Solve for x
    x = 22,499.58/133.45
  6. Step 6: Final answer
    x = 168.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.