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Finding the Third Proportional to 66,408 and 99,684

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Solution

The third proportional to 66,408 and 99,684 is: 149,634.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,408 : 99,684 = 99,684 : x
  2. Step 2: Convert to fraction form
    66,408/99,684 = 99,684/x
  3. Step 3: Cross multiply
    66,408x = 99,684 × 99,684
  4. Step 4: Simplify right side
    66,408x = 9,936,899,856
  5. Step 5: Solve for x
    x = 9,936,899,856/66,408
  6. Step 6: Final answer
    x = 149,634.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.