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Finding the Fourth Proportional to 133.25, 199.80 and 46.55

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Solution

The fourth proportional to 133.25, 199.80 and 46.55 is: 69.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.25 : 199.80 = 46.55 : x
  2. Step 2: Convert to fraction form
    133.25/199.80 = 46.55/x
  3. Step 3: Cross multiply
    133.25x = 199.80 × 46.55
  4. Step 4: Simplify right side
    133.25x = 9,299.69
  5. Step 5: Solve for x
    x = 9,299.69/133.25
  6. Step 6: Final answer
    x = 69.79

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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.