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Finding the Fourth Proportional to 139.56, 209.01 and 110.43

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Solution

The fourth proportional to 139.56, 209.01 and 110.43 is: 165.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.56 : 209.01 = 110.43 : x
  2. Step 2: Convert to fraction form
    139.56/209.01 = 110.43/x
  3. Step 3: Cross multiply
    139.56x = 209.01 × 110.43
  4. Step 4: Simplify right side
    139.56x = 23,080.97
  5. Step 5: Solve for x
    x = 23,080.97/139.56
  6. Step 6: Final answer
    x = 165.38

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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.