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Finding the Third Proportional to 37,830 and 81,438

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Solution

The third proportional to 37,830 and 81,438 is: 175,314.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,830 : 81,438 = 81,438 : x
  2. Step 2: Convert to fraction form
    37,830/81,438 = 81,438/x
  3. Step 3: Cross multiply
    37,830x = 81,438 × 81,438
  4. Step 4: Simplify right side
    37,830x = 6,632,147,844
  5. Step 5: Solve for x
    x = 6,632,147,844/37,830
  6. Step 6: Final answer
    x = 175,314.51

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.