Home / 394,295.45-591,612.66-128,137.55

Finding the Fourth Proportional to 394,295.45, 591,612.66 and 128,137.55

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Solution

The fourth proportional to 394,295.45, 591,612.66 and 128,137.55 is: 192,261.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,295.45 : 591,612.66 = 128,137.55 : x
  2. Step 2: Convert to fraction form
    394,295.45/591,612.66 = 128,137.55/x
  3. Step 3: Cross multiply
    394,295.45x = 591,612.66 × 128,137.55
  4. Step 4: Simplify right side
    394,295.45x = 75,807,793,843.32
  5. Step 5: Solve for x
    x = 75,807,793,843.32/394,295.45
  6. Step 6: Final answer
    x = 192,261.40

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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.