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Finding the Third Proportional to 56,740 and 121,904

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Solution

The third proportional to 56,740 and 121,904 is: 261,906.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,740 : 121,904 = 121,904 : x
  2. Step 2: Convert to fraction form
    56,740/121,904 = 121,904/x
  3. Step 3: Cross multiply
    56,740x = 121,904 × 121,904
  4. Step 4: Simplify right side
    56,740x = 14,860,585,216
  5. Step 5: Solve for x
    x = 14,860,585,216/56,740
  6. Step 6: Final answer
    x = 261,906.68

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.