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Finding the Third Proportional to 79,890,170 and 172,121,620

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Solution

The third proportional to 79,890,170 and 172,121,620 is: 370,832,257.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,890,170 : 172,121,620 = 172,121,620 : x
  2. Step 2: Convert to fraction form
    79,890,170/172,121,620 = 172,121,620/x
  3. Step 3: Cross multiply
    79,890,170x = 172,121,620 × 172,121,620
  4. Step 4: Simplify right side
    79,890,170x = 29,625,852,071,424,400
  5. Step 5: Solve for x
    x = 29,625,852,071,424,400/79,890,170
  6. Step 6: Final answer
    x = 370,832,257.23

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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.