Home / 419,904,518.10-629,856,777.15-128,816,567.70

Finding the Fourth Proportional to 419,904,518.10, 629,856,777.15 and 128,816,567.70

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Solution

The fourth proportional to 419,904,518.10, 629,856,777.15 and 128,816,567.70 is: 193,224,851.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,518.10 : 629,856,777.15 = 128,816,567.70 : x
  2. Step 2: Convert to fraction form
    419,904,518.10/629,856,777.15 = 128,816,567.70/x
  3. Step 3: Cross multiply
    419,904,518.10x = 629,856,777.15 × 128,816,567.70
  4. Step 4: Simplify right side
    419,904,518.10x = 81,135,988,175,046,784
  5. Step 5: Solve for x
    x = 81,135,988,175,046,784/419,904,518.10
  6. Step 6: Final answer
    x = 193,224,851.55

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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.