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Finding the Third Proportional to 28,820 and 62,689

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Solution

The third proportional to 28,820 and 62,689 is: 136,360.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,820 : 62,689 = 62,689 : x
  2. Step 2: Convert to fraction form
    28,820/62,689 = 62,689/x
  3. Step 3: Cross multiply
    28,820x = 62,689 × 62,689
  4. Step 4: Simplify right side
    28,820x = 3,929,910,721
  5. Step 5: Solve for x
    x = 3,929,910,721/28,820
  6. Step 6: Final answer
    x = 136,360.54

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.