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Finding the Third Proportional to 64,220 and 139,624

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Solution

The third proportional to 64,220 and 139,624 is: 303,563.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,220 : 139,624 = 139,624 : x
  2. Step 2: Convert to fraction form
    64,220/139,624 = 139,624/x
  3. Step 3: Cross multiply
    64,220x = 139,624 × 139,624
  4. Step 4: Simplify right side
    64,220x = 19,494,861,376
  5. Step 5: Solve for x
    x = 19,494,861,376/64,220
  6. Step 6: Final answer
    x = 303,563.71

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.