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Finding the Third Proportional to 57,408 and 121,645

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Solution

The third proportional to 57,408 and 121,645 is: 257,760.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,408 : 121,645 = 121,645 : x
  2. Step 2: Convert to fraction form
    57,408/121,645 = 121,645/x
  3. Step 3: Cross multiply
    57,408x = 121,645 × 121,645
  4. Step 4: Simplify right side
    57,408x = 14,797,506,025
  5. Step 5: Solve for x
    x = 14,797,506,025/57,408
  6. Step 6: Final answer
    x = 257,760.35

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.