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Finding the Fourth Proportional to 133.96, 200.85 and 68.90

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Solution

The fourth proportional to 133.96, 200.85 and 68.90 is: 103.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.96 : 200.85 = 68.90 : x
  2. Step 2: Convert to fraction form
    133.96/200.85 = 68.90/x
  3. Step 3: Cross multiply
    133.96x = 200.85 × 68.90
  4. Step 4: Simplify right side
    133.96x = 13,839.00
  5. Step 5: Solve for x
    x = 13,839.00/133.96
  6. Step 6: Final answer
    x = 103.31

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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.