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Finding the Third Proportional to 65,718 and 92,990

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Solution

The third proportional to 65,718 and 92,990 is: 131,579.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,718 : 92,990 = 92,990 : x
  2. Step 2: Convert to fraction form
    65,718/92,990 = 92,990/x
  3. Step 3: Cross multiply
    65,718x = 92,990 × 92,990
  4. Step 4: Simplify right side
    65,718x = 8,647,140,100
  5. Step 5: Solve for x
    x = 8,647,140,100/65,718
  6. Step 6: Final answer
    x = 131,579.48

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.