Home / 419,905,120.20-629,857,680.30-128,769,930.60

Finding the Fourth Proportional to 419,905,120.20, 629,857,680.30 and 128,769,930.60

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Solution

The fourth proportional to 419,905,120.20, 629,857,680.30 and 128,769,930.60 is: 193,154,895.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,905,120.20 : 629,857,680.30 = 128,769,930.60 : x
  2. Step 2: Convert to fraction form
    419,905,120.20/629,857,680.30 = 128,769,930.60/x
  3. Step 3: Cross multiply
    419,905,120.20x = 629,857,680.30 × 128,769,930.60
  4. Step 4: Simplify right side
    419,905,120.20x = 81,106,729,780,107,984
  5. Step 5: Solve for x
    x = 81,106,729,780,107,984/419,905,120.20
  6. Step 6: Final answer
    x = 193,154,895.90

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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.