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Finding the Third Proportional to 40,318 and 86,989

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Solution

The third proportional to 40,318 and 86,989 is: 187,685.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,318 : 86,989 = 86,989 : x
  2. Step 2: Convert to fraction form
    40,318/86,989 = 86,989/x
  3. Step 3: Cross multiply
    40,318x = 86,989 × 86,989
  4. Step 4: Simplify right side
    40,318x = 7,567,086,121
  5. Step 5: Solve for x
    x = 7,567,086,121/40,318
  6. Step 6: Final answer
    x = 187,685.06

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.