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Finding the Third Proportional to 124,766,990 and 278,221,912

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Solution

The third proportional to 124,766,990 and 278,221,912 is: 620,415,963.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,766,990 : 278,221,912 = 278,221,912 : x
  2. Step 2: Convert to fraction form
    124,766,990/278,221,912 = 278,221,912/x
  3. Step 3: Cross multiply
    124,766,990x = 278,221,912 × 278,221,912
  4. Step 4: Simplify right side
    124,766,990x = 77,407,432,316,935,744
  5. Step 5: Solve for x
    x = 77,407,432,316,935,744/124,766,990
  6. Step 6: Final answer
    x = 620,415,963.52

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Why These Related Problems?

These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.