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Finding the Third Proportional to 53,920 and 81,968

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Solution

The third proportional to 53,920 and 81,968 is: 124,605.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,920 : 81,968 = 81,968 : x
  2. Step 2: Convert to fraction form
    53,920/81,968 = 81,968/x
  3. Step 3: Cross multiply
    53,920x = 81,968 × 81,968
  4. Step 4: Simplify right side
    53,920x = 6,718,753,024
  5. Step 5: Solve for x
    x = 6,718,753,024/53,920
  6. Step 6: Final answer
    x = 124,605.95

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.