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Finding the Third Proportional to 87,421,638 and 190,664,556

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Solution

The third proportional to 87,421,638 and 190,664,556 is: 415,834,955.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,421,638 : 190,664,556 = 190,664,556 : x
  2. Step 2: Convert to fraction form
    87,421,638/190,664,556 = 190,664,556/x
  3. Step 3: Cross multiply
    87,421,638x = 190,664,556 × 190,664,556
  4. Step 4: Simplify right side
    87,421,638x = 36,352,972,914,677,136
  5. Step 5: Solve for x
    x = 36,352,972,914,677,136/87,421,638
  6. Step 6: Final answer
    x = 415,834,955.12

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.