Home / 419,907,632.10-629,861,448.15-128,819,681.70

Finding the Fourth Proportional to 419,907,632.10, 629,861,448.15 and 128,819,681.70

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Solution

The fourth proportional to 419,907,632.10, 629,861,448.15 and 128,819,681.70 is: 193,229,522.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,907,632.10 : 629,861,448.15 = 128,819,681.70 : x
  2. Step 2: Convert to fraction form
    419,907,632.10/629,861,448.15 = 128,819,681.70/x
  3. Step 3: Cross multiply
    419,907,632.10x = 629,861,448.15 × 128,819,681.70
  4. Step 4: Simplify right side
    419,907,632.10x = 81,138,551,265,784,048
  5. Step 5: Solve for x
    x = 81,138,551,265,784,048/419,907,632.10
  6. Step 6: Final answer
    x = 193,229,522.55

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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.