Home / 419,904,389.70-629,856,584.55-128,769,200.10

Finding the Fourth Proportional to 419,904,389.70, 629,856,584.55 and 128,769,200.10

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Solution

The fourth proportional to 419,904,389.70, 629,856,584.55 and 128,769,200.10 is: 193,153,800.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,389.70 : 629,856,584.55 = 128,769,200.10 : x
  2. Step 2: Convert to fraction form
    419,904,389.70/629,856,584.55 = 128,769,200.10/x
  3. Step 3: Cross multiply
    419,904,389.70x = 629,856,584.55 × 128,769,200.10
  4. Step 4: Simplify right side
    419,904,389.70x = 81,106,128,570,221,504
  5. Step 5: Solve for x
    x = 81,106,128,570,221,504/419,904,389.70
  6. Step 6: Final answer
    x = 193,153,800.15

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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.