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Finding the Fourth Proportional to 139.35, 191.50 and 133.01

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Solution

The fourth proportional to 139.35, 191.50 and 133.01 is: 182.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.35 : 191.50 = 133.01 : x
  2. Step 2: Convert to fraction form
    139.35/191.50 = 133.01/x
  3. Step 3: Cross multiply
    139.35x = 191.50 × 133.01
  4. Step 4: Simplify right side
    139.35x = 25,470.75
  5. Step 5: Solve for x
    x = 25,470.75/139.35
  6. Step 6: Final answer
    x = 182.78

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.