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Finding the Third Proportional to 38,875 and 81,666

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Solution

The third proportional to 38,875 and 81,666 is: 171,558.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,875 : 81,666 = 81,666 : x
  2. Step 2: Convert to fraction form
    38,875/81,666 = 81,666/x
  3. Step 3: Cross multiply
    38,875x = 81,666 × 81,666
  4. Step 4: Simplify right side
    38,875x = 6,669,335,556
  5. Step 5: Solve for x
    x = 6,669,335,556/38,875
  6. Step 6: Final answer
    x = 171,558.47

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.