Home / 419,076,309.20-628,711,728.77-142,729,917.57

Finding the Fourth Proportional to 419,076,309.20, 628,711,728.77 and 142,729,917.57

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Solution

The fourth proportional to 419,076,309.20, 628,711,728.77 and 142,729,917.57 is: 214,128,003.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,076,309.20 : 628,711,728.77 = 142,729,917.57 : x
  2. Step 2: Convert to fraction form
    419,076,309.20/628,711,728.77 = 142,729,917.57/x
  3. Step 3: Cross multiply
    419,076,309.20x = 628,711,728.77 × 142,729,917.57
  4. Step 4: Simplify right side
    419,076,309.20x = 89,735,973,222,991,120
  5. Step 5: Solve for x
    x = 89,735,973,222,991,120/419,076,309.20
  6. Step 6: Final answer
    x = 214,128,003.07

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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.