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Finding the Third Proportional to 30,812 and 47,108

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Solution

The third proportional to 30,812 and 47,108 is: 72,022.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,812 : 47,108 = 47,108 : x
  2. Step 2: Convert to fraction form
    30,812/47,108 = 47,108/x
  3. Step 3: Cross multiply
    30,812x = 47,108 × 47,108
  4. Step 4: Simplify right side
    30,812x = 2,219,163,664
  5. Step 5: Solve for x
    x = 2,219,163,664/30,812
  6. Step 6: Final answer
    x = 72,022.71

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.