Home / 419,280,912.20-628,921,368.30-128,147,472.20

Finding the Fourth Proportional to 419,280,912.20, 628,921,368.30 and 128,147,472.20

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Solution

The fourth proportional to 419,280,912.20, 628,921,368.30 and 128,147,472.20 is: 192,221,208.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,280,912.20 : 628,921,368.30 = 128,147,472.20 : x
  2. Step 2: Convert to fraction form
    419,280,912.20/628,921,368.30 = 128,147,472.20/x
  3. Step 3: Cross multiply
    419,280,912.20x = 628,921,368.30 × 128,147,472.20
  4. Step 4: Simplify right side
    419,280,912.20x = 80,594,683,560,210,208
  5. Step 5: Solve for x
    x = 80,594,683,560,210,208/419,280,912.20
  6. Step 6: Final answer
    x = 192,221,208.30

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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.