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Finding the Fourth Proportional to 133.45, 199.11 and 119.77

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Solution

The fourth proportional to 133.45, 199.11 and 119.77 is: 178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.45 : 199.11 = 119.77 : x
  2. Step 2: Convert to fraction form
    133.45/199.11 = 119.77/x
  3. Step 3: Cross multiply
    133.45x = 199.11 × 119.77
  4. Step 4: Simplify right side
    133.45x = 23,847.40
  5. Step 5: Solve for x
    x = 23,847.40/133.45
  6. Step 6: Final answer
    x = 178.70

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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.