Home / 419,664,188.40-629,543,521.80-128,528,998.80

Finding the Fourth Proportional to 419,664,188.40, 629,543,521.80 and 128,528,998.80

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Solution

The fourth proportional to 419,664,188.40, 629,543,521.80 and 128,528,998.80 is: 192,807,965.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,664,188.40 : 629,543,521.80 = 128,528,998.80 : x
  2. Step 2: Convert to fraction form
    419,664,188.40/629,543,521.80 = 128,528,998.80/x
  3. Step 3: Cross multiply
    419,664,188.40x = 629,543,521.80 × 128,528,998.80
  4. Step 4: Simplify right side
    419,664,188.40x = 80,914,598,557,979,968
  5. Step 5: Solve for x
    x = 80,914,598,557,979,968/419,664,188.40
  6. Step 6: Final answer
    x = 192,807,965.98

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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.