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Finding the Third Proportional to 87,297,557 and 121,380,276

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Solution

The third proportional to 87,297,557 and 121,380,276 is: 168,769,572.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,297,557 : 121,380,276 = 121,380,276 : x
  2. Step 2: Convert to fraction form
    87,297,557/121,380,276 = 121,380,276/x
  3. Step 3: Cross multiply
    87,297,557x = 121,380,276 × 121,380,276
  4. Step 4: Simplify right side
    87,297,557x = 14,733,171,401,836,176
  5. Step 5: Solve for x
    x = 14,733,171,401,836,176/87,297,557
  6. Step 6: Final answer
    x = 168,769,572.81

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.