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Finding the Third Proportional to 68,272 and 147,920

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Solution

The third proportional to 68,272 and 147,920 is: 320,487.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,272 : 147,920 = 147,920 : x
  2. Step 2: Convert to fraction form
    68,272/147,920 = 147,920/x
  3. Step 3: Cross multiply
    68,272x = 147,920 × 147,920
  4. Step 4: Simplify right side
    68,272x = 21,880,326,400
  5. Step 5: Solve for x
    x = 21,880,326,400/68,272
  6. Step 6: Final answer
    x = 320,487.56

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.