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Finding the Third Proportional to 39,974 and 87,400

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Solution

The third proportional to 39,974 and 87,400 is: 191,093.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,974 : 87,400 = 87,400 : x
  2. Step 2: Convert to fraction form
    39,974/87,400 = 87,400/x
  3. Step 3: Cross multiply
    39,974x = 87,400 × 87,400
  4. Step 4: Simplify right side
    39,974x = 7,638,760,000
  5. Step 5: Solve for x
    x = 7,638,760,000/39,974
  6. Step 6: Final answer
    x = 191,093.21

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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.