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Finding the Third Proportional to 39,418 and 57,660

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Solution

The third proportional to 39,418 and 57,660 is: 84,344.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,418 : 57,660 = 57,660 : x
  2. Step 2: Convert to fraction form
    39,418/57,660 = 57,660/x
  3. Step 3: Cross multiply
    39,418x = 57,660 × 57,660
  4. Step 4: Simplify right side
    39,418x = 3,324,675,600
  5. Step 5: Solve for x
    x = 3,324,675,600/39,418
  6. Step 6: Final answer
    x = 84,344.10

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.