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Finding the Third Proportional to 43,720 and 90,414

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Solution

The third proportional to 43,720 and 90,414 is: 186,978.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,720 : 90,414 = 90,414 : x
  2. Step 2: Convert to fraction form
    43,720/90,414 = 90,414/x
  3. Step 3: Cross multiply
    43,720x = 90,414 × 90,414
  4. Step 4: Simplify right side
    43,720x = 8,174,691,396
  5. Step 5: Solve for x
    x = 8,174,691,396/43,720
  6. Step 6: Final answer
    x = 186,978.30

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.