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Finding the Third Proportional to 64,728 and 86,926

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Solution

The third proportional to 64,728 and 86,926 is: 116,736.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,728 : 86,926 = 86,926 : x
  2. Step 2: Convert to fraction form
    64,728/86,926 = 86,926/x
  3. Step 3: Cross multiply
    64,728x = 86,926 × 86,926
  4. Step 4: Simplify right side
    64,728x = 7,556,129,476
  5. Step 5: Solve for x
    x = 7,556,129,476/64,728
  6. Step 6: Final answer
    x = 116,736.64

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.