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Finding the Third Proportional to 67,686 and 99,219

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Solution

The third proportional to 67,686 and 99,219 is: 145,442.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,686 : 99,219 = 99,219 : x
  2. Step 2: Convert to fraction form
    67,686/99,219 = 99,219/x
  3. Step 3: Cross multiply
    67,686x = 99,219 × 99,219
  4. Step 4: Simplify right side
    67,686x = 9,844,409,961
  5. Step 5: Solve for x
    x = 9,844,409,961/67,686
  6. Step 6: Final answer
    x = 145,442.34

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.