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Finding the Third Proportional to 30,158 and 66,331

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Solution

The third proportional to 30,158 and 66,331 is: 145,891.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,158 : 66,331 = 66,331 : x
  2. Step 2: Convert to fraction form
    30,158/66,331 = 66,331/x
  3. Step 3: Cross multiply
    30,158x = 66,331 × 66,331
  4. Step 4: Simplify right side
    30,158x = 4,399,801,561
  5. Step 5: Solve for x
    x = 4,399,801,561/30,158
  6. Step 6: Final answer
    x = 145,891.69

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.