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Finding the Fourth Proportional to 133.89, 200.91 and 61.75

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Solution

The fourth proportional to 133.89, 200.91 and 61.75 is: 92.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.89 : 200.91 = 61.75 : x
  2. Step 2: Convert to fraction form
    133.89/200.91 = 61.75/x
  3. Step 3: Cross multiply
    133.89x = 200.91 × 61.75
  4. Step 4: Simplify right side
    133.89x = 12,406.19
  5. Step 5: Solve for x
    x = 12,406.19/133.89
  6. Step 6: Final answer
    x = 92.66

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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.