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Finding the Fourth Proportional to 139.36, 192.33 and 80.33

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Solution

The fourth proportional to 139.36, 192.33 and 80.33 is: 110.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.36 : 192.33 = 80.33 : x
  2. Step 2: Convert to fraction form
    139.36/192.33 = 80.33/x
  3. Step 3: Cross multiply
    139.36x = 192.33 × 80.33
  4. Step 4: Simplify right side
    139.36x = 15,450.54
  5. Step 5: Solve for x
    x = 15,450.54/139.36
  6. Step 6: Final answer
    x = 110.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.