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Finding the Fourth Proportional to 139.55, 209.04 and 93.92

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Solution

The fourth proportional to 139.55, 209.04 and 93.92 is: 140.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.55 : 209.04 = 93.92 : x
  2. Step 2: Convert to fraction form
    139.55/209.04 = 93.92/x
  3. Step 3: Cross multiply
    139.55x = 209.04 × 93.92
  4. Step 4: Simplify right side
    139.55x = 19,633.04
  5. Step 5: Solve for x
    x = 19,633.04/139.55
  6. Step 6: Final answer
    x = 140.69

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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.