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Finding the Fourth Proportional to 133.08, 198.65 and 123.80

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Solution

The fourth proportional to 133.08, 198.65 and 123.80 is: 184.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.08 : 198.65 = 123.80 : x
  2. Step 2: Convert to fraction form
    133.08/198.65 = 123.80/x
  3. Step 3: Cross multiply
    133.08x = 198.65 × 123.80
  4. Step 4: Simplify right side
    133.08x = 24,591.26
  5. Step 5: Solve for x
    x = 24,591.26/133.08
  6. Step 6: Final answer
    x = 184.79

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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.