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Finding the Third Proportional to 79,890,132 and 172,121,528

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Solution

The third proportional to 79,890,132 and 172,121,528 is: 370,832,037.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,890,132 : 172,121,528 = 172,121,528 : x
  2. Step 2: Convert to fraction form
    79,890,132/172,121,528 = 172,121,528/x
  3. Step 3: Cross multiply
    79,890,132x = 172,121,528 × 172,121,528
  4. Step 4: Simplify right side
    79,890,132x = 29,625,820,401,054,784
  5. Step 5: Solve for x
    x = 29,625,820,401,054,784/79,890,132
  6. Step 6: Final answer
    x = 370,832,037.19

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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.