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Finding the Fourth Proportional to 253,972,352.80, 380,958,529.20 and 81,466,604.20

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Solution

The fourth proportional to 253,972,352.80, 380,958,529.20 and 81,466,604.20 is: 122,199,906.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,972,352.80 : 380,958,529.20 = 81,466,604.20 : x
  2. Step 2: Convert to fraction form
    253,972,352.80/380,958,529.20 = 81,466,604.20/x
  3. Step 3: Cross multiply
    253,972,352.80x = 380,958,529.20 × 81,466,604.20
  4. Step 4: Simplify right side
    253,972,352.80x = 31,035,397,714,950,544
  5. Step 5: Solve for x
    x = 31,035,397,714,950,544/253,972,352.80
  6. Step 6: Final answer
    x = 122,199,906.30

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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.