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Finding the Third Proportional to 54,875 and 81,988

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Solution

The third proportional to 54,875 and 81,988 is: 122,497.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,875 : 81,988 = 81,988 : x
  2. Step 2: Convert to fraction form
    54,875/81,988 = 81,988/x
  3. Step 3: Cross multiply
    54,875x = 81,988 × 81,988
  4. Step 4: Simplify right side
    54,875x = 6,722,032,144
  5. Step 5: Solve for x
    x = 6,722,032,144/54,875
  6. Step 6: Final answer
    x = 122,497.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.