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Finding the Third Proportional to 79,890,171 and 172,121,619

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Solution

The third proportional to 79,890,171 and 172,121,619 is: 370,832,248.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,890,171 : 172,121,619 = 172,121,619 : x
  2. Step 2: Convert to fraction form
    79,890,171/172,121,619 = 172,121,619/x
  3. Step 3: Cross multiply
    79,890,171x = 172,121,619 × 172,121,619
  4. Step 4: Simplify right side
    79,890,171x = 29,625,851,727,181,160
  5. Step 5: Solve for x
    x = 29,625,851,727,181,160/79,890,171
  6. Step 6: Final answer
    x = 370,832,248.28

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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.