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Finding the Fourth Proportional to 168,085,363.20, 251,978,745.60 and 99,855,628.80

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Solution

The fourth proportional to 168,085,363.20, 251,978,745.60 and 99,855,628.80 is: 149,694,748.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,085,363.20 : 251,978,745.60 = 99,855,628.80 : x
  2. Step 2: Convert to fraction form
    168,085,363.20/251,978,745.60 = 99,855,628.80/x
  3. Step 3: Cross multiply
    168,085,363.20x = 251,978,745.60 × 99,855,628.80
  4. Step 4: Simplify right side
    168,085,363.20x = 25,161,496,086,123,232
  5. Step 5: Solve for x
    x = 25,161,496,086,123,232/168,085,363.20
  6. Step 6: Final answer
    x = 149,694,748.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.