Home / 419,904,420.60-629,856,630.90-128,816,470.20

Finding the Fourth Proportional to 419,904,420.60, 629,856,630.90 and 128,816,470.20

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Solution

The fourth proportional to 419,904,420.60, 629,856,630.90 and 128,816,470.20 is: 193,224,705.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,420.60 : 629,856,630.90 = 128,816,470.20 : x
  2. Step 2: Convert to fraction form
    419,904,420.60/629,856,630.90 = 128,816,470.20/x
  3. Step 3: Cross multiply
    419,904,420.60x = 629,856,630.90 × 128,816,470.20
  4. Step 4: Simplify right side
    419,904,420.60x = 81,135,907,924,602,240
  5. Step 5: Solve for x
    x = 81,135,907,924,602,240/419,904,420.60
  6. Step 6: Final answer
    x = 193,224,705.30

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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.