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Finding the Fourth Proportional to 139.24, 209.71 and 132.52

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Solution

The fourth proportional to 139.24, 209.71 and 132.52 is: 199.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.24 : 209.71 = 132.52 : x
  2. Step 2: Convert to fraction form
    139.24/209.71 = 132.52/x
  3. Step 3: Cross multiply
    139.24x = 209.71 × 132.52
  4. Step 4: Simplify right side
    139.24x = 27,790.77
  5. Step 5: Solve for x
    x = 27,790.77/139.24
  6. Step 6: Final answer
    x = 199.59

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.