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Finding the Third Proportional to 48,431 and 72,926

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Solution

The third proportional to 48,431 and 72,926 is: 109,809.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,431 : 72,926 = 72,926 : x
  2. Step 2: Convert to fraction form
    48,431/72,926 = 72,926/x
  3. Step 3: Cross multiply
    48,431x = 72,926 × 72,926
  4. Step 4: Simplify right side
    48,431x = 5,318,201,476
  5. Step 5: Solve for x
    x = 5,318,201,476/48,431
  6. Step 6: Final answer
    x = 109,809.86

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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.