Home / 419,280,909.70-628,921,364.55-128,147,469.70

Finding the Fourth Proportional to 419,280,909.70, 628,921,364.55 and 128,147,469.70

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Solution

The fourth proportional to 419,280,909.70, 628,921,364.55 and 128,147,469.70 is: 192,221,204.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,280,909.70 : 628,921,364.55 = 128,147,469.70 : x
  2. Step 2: Convert to fraction form
    419,280,909.70/628,921,364.55 = 128,147,469.70/x
  3. Step 3: Cross multiply
    419,280,909.70x = 628,921,364.55 × 128,147,469.70
  4. Step 4: Simplify right side
    419,280,909.70x = 80,594,681,507,353,776
  5. Step 5: Solve for x
    x = 80,594,681,507,353,776/419,280,909.70
  6. Step 6: Final answer
    x = 192,221,204.55

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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.