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Finding the Third Proportional to 48,742 and 72,912

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Solution

The third proportional to 48,742 and 72,912 is: 109,067.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,742 : 72,912 = 72,912 : x
  2. Step 2: Convert to fraction form
    48,742/72,912 = 72,912/x
  3. Step 3: Cross multiply
    48,742x = 72,912 × 72,912
  4. Step 4: Simplify right side
    48,742x = 5,316,159,744
  5. Step 5: Solve for x
    x = 5,316,159,744/48,742
  6. Step 6: Final answer
    x = 109,067.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.