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Finding the Third Proportional to 79,890,172 and 172,121,624

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Solution

The third proportional to 79,890,172 and 172,121,624 is: 370,832,265.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,890,172 : 172,121,624 = 172,121,624 : x
  2. Step 2: Convert to fraction form
    79,890,172/172,121,624 = 172,121,624/x
  3. Step 3: Cross multiply
    79,890,172x = 172,121,624 × 172,121,624
  4. Step 4: Simplify right side
    79,890,172x = 29,625,853,448,397,376
  5. Step 5: Solve for x
    x = 29,625,853,448,397,376/79,890,172
  6. Step 6: Final answer
    x = 370,832,265.18

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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.