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Finding the Fourth Proportional to 192,787.20, 289,180.80 and 87,811.20

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Solution

The fourth proportional to 192,787.20, 289,180.80 and 87,811.20 is: 131,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,787.20 : 289,180.80 = 87,811.20 : x
  2. Step 2: Convert to fraction form
    192,787.20/289,180.80 = 87,811.20/x
  3. Step 3: Cross multiply
    192,787.20x = 289,180.80 × 87,811.20
  4. Step 4: Simplify right side
    192,787.20x = 25,393,313,064.96
  5. Step 5: Solve for x
    x = 25,393,313,064.96/192,787.20
  6. Step 6: Final answer
    x = 131,716.80

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1.5x scale

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.