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Finding the Third Proportional to 39,912 and 87,480

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Solution

The third proportional to 39,912 and 87,480 is: 191,740.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,912 : 87,480 = 87,480 : x
  2. Step 2: Convert to fraction form
    39,912/87,480 = 87,480/x
  3. Step 3: Cross multiply
    39,912x = 87,480 × 87,480
  4. Step 4: Simplify right side
    39,912x = 7,652,750,400
  5. Step 5: Solve for x
    x = 7,652,750,400/39,912
  6. Step 6: Final answer
    x = 191,740.59

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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.