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Finding the Third Proportional to 30,280 and 66,392

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Solution

The third proportional to 30,280 and 66,392 is: 145,571.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,280 : 66,392 = 66,392 : x
  2. Step 2: Convert to fraction form
    30,280/66,392 = 66,392/x
  3. Step 3: Cross multiply
    30,280x = 66,392 × 66,392
  4. Step 4: Simplify right side
    30,280x = 4,407,897,664
  5. Step 5: Solve for x
    x = 4,407,897,664/30,280
  6. Step 6: Final answer
    x = 145,571.26

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.