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Finding the Third Proportional to 73,968.19 and 81,486

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Solution

The third proportional to 73,968.19 and 81,486 is: 89,767.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,968.19 : 81,486 = 81,486 : x
  2. Step 2: Convert to fraction form
    73,968.19/81,486 = 81,486/x
  3. Step 3: Cross multiply
    73,968.19x = 81,486 × 81,486
  4. Step 4: Simplify right side
    73,968.19x = 6,639,968,196
  5. Step 5: Solve for x
    x = 6,639,968,196/73,968.19
  6. Step 6: Final answer
    x = 89,767.89

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Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.