Home / 419,904,481.20-629,856,721.80-128,769,291.60

Finding the Fourth Proportional to 419,904,481.20, 629,856,721.80 and 128,769,291.60

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Solution

The fourth proportional to 419,904,481.20, 629,856,721.80 and 128,769,291.60 is: 193,153,937.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,481.20 : 629,856,721.80 = 128,769,291.60 : x
  2. Step 2: Convert to fraction form
    419,904,481.20/629,856,721.80 = 128,769,291.60/x
  3. Step 3: Cross multiply
    419,904,481.20x = 629,856,721.80 × 128,769,291.60
  4. Step 4: Simplify right side
    419,904,481.20x = 81,106,203,875,684,272
  5. Step 5: Solve for x
    x = 81,106,203,875,684,272/419,904,481.20
  6. Step 6: Final answer
    x = 193,153,937.40

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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.