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Finding the Third Proportional to 54,216 and 81,468

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Solution

The third proportional to 54,216 and 81,468 is: 122,418.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,216 : 81,468 = 81,468 : x
  2. Step 2: Convert to fraction form
    54,216/81,468 = 81,468/x
  3. Step 3: Cross multiply
    54,216x = 81,468 × 81,468
  4. Step 4: Simplify right side
    54,216x = 6,637,035,024
  5. Step 5: Solve for x
    x = 6,637,035,024/54,216
  6. Step 6: Final answer
    x = 122,418.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.