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Finding the Third Proportional to 120,868 and 261,820

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Solution

The third proportional to 120,868 and 261,820 is: 567,145.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,868 : 261,820 = 261,820 : x
  2. Step 2: Convert to fraction form
    120,868/261,820 = 261,820/x
  3. Step 3: Cross multiply
    120,868x = 261,820 × 261,820
  4. Step 4: Simplify right side
    120,868x = 68,549,712,400
  5. Step 5: Solve for x
    x = 68,549,712,400/120,868
  6. Step 6: Final answer
    x = 567,145.25

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.