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Finding the Third Proportional to 39,915 and 87,606

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Solution

The third proportional to 39,915 and 87,606 is: 192,278.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,915 : 87,606 = 87,606 : x
  2. Step 2: Convert to fraction form
    39,915/87,606 = 87,606/x
  3. Step 3: Cross multiply
    39,915x = 87,606 × 87,606
  4. Step 4: Simplify right side
    39,915x = 7,674,811,236
  5. Step 5: Solve for x
    x = 7,674,811,236/39,915
  6. Step 6: Final answer
    x = 192,278.87

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.