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Finding the Third Proportional to 27,915 and 43,176

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Solution

The third proportional to 27,915 and 43,176 is: 66,780.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,915 : 43,176 = 43,176 : x
  2. Step 2: Convert to fraction form
    27,915/43,176 = 43,176/x
  3. Step 3: Cross multiply
    27,915x = 43,176 × 43,176
  4. Step 4: Simplify right side
    27,915x = 1,864,166,976
  5. Step 5: Solve for x
    x = 1,864,166,976/27,915
  6. Step 6: Final answer
    x = 66,780.12

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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.