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Finding the Third Proportional to 39,987 and 59,759

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Solution

The third proportional to 39,987 and 59,759 is: 89,307.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,987 : 59,759 = 59,759 : x
  2. Step 2: Convert to fraction form
    39,987/59,759 = 59,759/x
  3. Step 3: Cross multiply
    39,987x = 59,759 × 59,759
  4. Step 4: Simplify right side
    39,987x = 3,571,138,081
  5. Step 5: Solve for x
    x = 3,571,138,081/39,987
  6. Step 6: Final answer
    x = 89,307.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.