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Finding the Third Proportional to 27,681 and 42,979.75

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Solution

The third proportional to 27,681 and 42,979.75 is: 66,733.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,681 : 42,979.75 = 42,979.75 : x
  2. Step 2: Convert to fraction form
    27,681/42,979.75 = 42,979.75/x
  3. Step 3: Cross multiply
    27,681x = 42,979.75 × 42,979.75
  4. Step 4: Simplify right side
    27,681x = 1,847,258,910.06
  5. Step 5: Solve for x
    x = 1,847,258,910.06/27,681
  6. Step 6: Final answer
    x = 66,733.82

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.