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Finding the Fourth Proportional to 279,780,660.80, 419,670,991.20 and 88,304,436.80

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Solution

The fourth proportional to 279,780,660.80, 419,670,991.20 and 88,304,436.80 is: 132,456,655.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,780,660.80 : 419,670,991.20 = 88,304,436.80 : x
  2. Step 2: Convert to fraction form
    279,780,660.80/419,670,991.20 = 88,304,436.80/x
  3. Step 3: Cross multiply
    279,780,660.80x = 419,670,991.20 × 88,304,436.80
  4. Step 4: Simplify right side
    279,780,660.80x = 37,058,810,519,213,752
  5. Step 5: Solve for x
    x = 37,058,810,519,213,752/279,780,660.80
  6. Step 6: Final answer
    x = 132,456,655.20

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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.