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Finding the Fourth Proportional to 133.30, 199.77 and 102.61

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Solution

The fourth proportional to 133.30, 199.77 and 102.61 is: 153.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.30 : 199.77 = 102.61 : x
  2. Step 2: Convert to fraction form
    133.30/199.77 = 102.61/x
  3. Step 3: Cross multiply
    133.30x = 199.77 × 102.61
  4. Step 4: Simplify right side
    133.30x = 20,498.40
  5. Step 5: Solve for x
    x = 20,498.40/133.30
  6. Step 6: Final answer
    x = 153.78

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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.