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Finding the Third Proportional to 30,678 and 48,489

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Solution

The third proportional to 30,678 and 48,489 is: 76,640.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,678 : 48,489 = 48,489 : x
  2. Step 2: Convert to fraction form
    30,678/48,489 = 48,489/x
  3. Step 3: Cross multiply
    30,678x = 48,489 × 48,489
  4. Step 4: Simplify right side
    30,678x = 2,351,183,121
  5. Step 5: Solve for x
    x = 2,351,183,121/30,678
  6. Step 6: Final answer
    x = 76,640.69

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.