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Finding the Fourth Proportional to 133.96, 200.90 and 103.72

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Solution

The fourth proportional to 133.96, 200.90 and 103.72 is: 155.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.96 : 200.90 = 103.72 : x
  2. Step 2: Convert to fraction form
    133.96/200.90 = 103.72/x
  3. Step 3: Cross multiply
    133.96x = 200.90 × 103.72
  4. Step 4: Simplify right side
    133.96x = 20,837.35
  5. Step 5: Solve for x
    x = 20,837.35/133.96
  6. Step 6: Final answer
    x = 155.55

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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.