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Finding the Third Proportional to 39,264 and 86,720

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Solution

The third proportional to 39,264 and 86,720 is: 191,533.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,264 : 86,720 = 86,720 : x
  2. Step 2: Convert to fraction form
    39,264/86,720 = 86,720/x
  3. Step 3: Cross multiply
    39,264x = 86,720 × 86,720
  4. Step 4: Simplify right side
    39,264x = 7,520,358,400
  5. Step 5: Solve for x
    x = 7,520,358,400/39,264
  6. Step 6: Final answer
    x = 191,533.17

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.