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Finding the Fourth Proportional to 133.60, 200.40 and 97.15

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Solution

The fourth proportional to 133.60, 200.40 and 97.15 is: 145.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.60 : 200.40 = 97.15 : x
  2. Step 2: Convert to fraction form
    133.60/200.40 = 97.15/x
  3. Step 3: Cross multiply
    133.60x = 200.40 × 97.15
  4. Step 4: Simplify right side
    133.60x = 19,468.86
  5. Step 5: Solve for x
    x = 19,468.86/133.60
  6. Step 6: Final answer
    x = 145.73

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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.