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Finding the Third Proportional to 64,756 and 138,728

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Solution

The third proportional to 64,756 and 138,728 is: 297,199.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,756 : 138,728 = 138,728 : x
  2. Step 2: Convert to fraction form
    64,756/138,728 = 138,728/x
  3. Step 3: Cross multiply
    64,756x = 138,728 × 138,728
  4. Step 4: Simplify right side
    64,756x = 19,245,457,984
  5. Step 5: Solve for x
    x = 19,245,457,984/64,756
  6. Step 6: Final answer
    x = 297,199.61

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.