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Finding the Third Proportional to 30,542 and 65,690

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Solution

The third proportional to 30,542 and 65,690 is: 141,286.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,542 : 65,690 = 65,690 : x
  2. Step 2: Convert to fraction form
    30,542/65,690 = 65,690/x
  3. Step 3: Cross multiply
    30,542x = 65,690 × 65,690
  4. Step 4: Simplify right side
    30,542x = 4,315,176,100
  5. Step 5: Solve for x
    x = 4,315,176,100/30,542
  6. Step 6: Final answer
    x = 141,286.62

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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.