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Finding the Third Proportional to 120,540,780 and 261,630,639

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Solution

The third proportional to 120,540,780 and 261,630,639 is: 567,862,521.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,540,780 : 261,630,639 = 261,630,639 : x
  2. Step 2: Convert to fraction form
    120,540,780/261,630,639 = 261,630,639/x
  3. Step 3: Cross multiply
    120,540,780x = 261,630,639 × 261,630,639
  4. Step 4: Simplify right side
    120,540,780x = 68,450,591,263,548,320
  5. Step 5: Solve for x
    x = 68,450,591,263,548,320/120,540,780
  6. Step 6: Final answer
    x = 567,862,521.41

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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.