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Finding the Third Proportional to 28,820 and 62,690

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Solution

The third proportional to 28,820 and 62,690 is: 136,364.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,820 : 62,690 = 62,690 : x
  2. Step 2: Convert to fraction form
    28,820/62,690 = 62,690/x
  3. Step 3: Cross multiply
    28,820x = 62,690 × 62,690
  4. Step 4: Simplify right side
    28,820x = 3,930,036,100
  5. Step 5: Solve for x
    x = 3,930,036,100/28,820
  6. Step 6: Final answer
    x = 136,364.89

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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.