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Finding the Third Proportional to 30,424 and 66,451

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Solution

The third proportional to 30,424 and 66,451 is: 145,139.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,424 : 66,451 = 66,451 : x
  2. Step 2: Convert to fraction form
    30,424/66,451 = 66,451/x
  3. Step 3: Cross multiply
    30,424x = 66,451 × 66,451
  4. Step 4: Simplify right side
    30,424x = 4,415,735,401
  5. Step 5: Solve for x
    x = 4,415,735,401/30,424
  6. Step 6: Final answer
    x = 145,139.87

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.