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Finding the Fourth Proportional to 139,266, 192,211.38 and 82,676.16

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Solution

The fourth proportional to 139,266, 192,211.38 and 82,676.16 is: 114,107.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,266 : 192,211.38 = 82,676.16 : x
  2. Step 2: Convert to fraction form
    139,266/192,211.38 = 82,676.16/x
  3. Step 3: Cross multiply
    139,266x = 192,211.38 × 82,676.16
  4. Step 4: Simplify right side
    139,266x = 15,891,298,806.70
  5. Step 5: Solve for x
    x = 15,891,298,806.70/139,266
  6. Step 6: Final answer
    x = 114,107.53

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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.