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Finding the Third Proportional to 34,272 and 51,840

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Solution

The third proportional to 34,272 and 51,840 is: 78,413.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,272 : 51,840 = 51,840 : x
  2. Step 2: Convert to fraction form
    34,272/51,840 = 51,840/x
  3. Step 3: Cross multiply
    34,272x = 51,840 × 51,840
  4. Step 4: Simplify right side
    34,272x = 2,687,385,600
  5. Step 5: Solve for x
    x = 2,687,385,600/34,272
  6. Step 6: Final answer
    x = 78,413.45

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.