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Finding the Third Proportional to 39,430 and 85,422

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Solution

The third proportional to 39,430 and 85,422 is: 185,060.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,430 : 85,422 = 85,422 : x
  2. Step 2: Convert to fraction form
    39,430/85,422 = 85,422/x
  3. Step 3: Cross multiply
    39,430x = 85,422 × 85,422
  4. Step 4: Simplify right side
    39,430x = 7,296,918,084
  5. Step 5: Solve for x
    x = 7,296,918,084/39,430
  6. Step 6: Final answer
    x = 185,060.06

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.