Home / 419,907,614.10-629,861,421.15-128,819,663.70

Finding the Fourth Proportional to 419,907,614.10, 629,861,421.15 and 128,819,663.70

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Solution

The fourth proportional to 419,907,614.10, 629,861,421.15 and 128,819,663.70 is: 193,229,495.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,907,614.10 : 629,861,421.15 = 128,819,663.70 : x
  2. Step 2: Convert to fraction form
    419,907,614.10/629,861,421.15 = 128,819,663.70/x
  3. Step 3: Cross multiply
    419,907,614.10x = 629,861,421.15 × 128,819,663.70
  4. Step 4: Simplify right side
    419,907,614.10x = 81,138,536,450,147,072
  5. Step 5: Solve for x
    x = 81,138,536,450,147,072/419,907,614.10
  6. Step 6: Final answer
    x = 193,229,495.55

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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.