Home / 419,664,189.40-629,543,523.30-128,528,999.80

Finding the Fourth Proportional to 419,664,189.40, 629,543,523.30 and 128,528,999.80

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Solution

The fourth proportional to 419,664,189.40, 629,543,523.30 and 128,528,999.80 is: 192,807,967.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,664,189.40 : 629,543,523.30 = 128,528,999.80 : x
  2. Step 2: Convert to fraction form
    419,664,189.40/629,543,523.30 = 128,528,999.80/x
  3. Step 3: Cross multiply
    419,664,189.40x = 629,543,523.30 × 128,528,999.80
  4. Step 4: Simplify right side
    419,664,189.40x = 80,914,599,380,316,992
  5. Step 5: Solve for x
    x = 80,914,599,380,316,992/419,664,189.40
  6. Step 6: Final answer
    x = 192,807,967.48

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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.