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Finding the Third Proportional to 39,636 and 86,643

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Solution

The third proportional to 39,636 and 86,643 is: 189,398.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,636 : 86,643 = 86,643 : x
  2. Step 2: Convert to fraction form
    39,636/86,643 = 86,643/x
  3. Step 3: Cross multiply
    39,636x = 86,643 × 86,643
  4. Step 4: Simplify right side
    39,636x = 7,507,009,449
  5. Step 5: Solve for x
    x = 7,507,009,449/39,636
  6. Step 6: Final answer
    x = 189,398.76

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.