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Finding the Fourth Proportional to 192,790.20, 288,990.90 and 87,684.60

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Solution

The fourth proportional to 192,790.20, 288,990.90 and 87,684.60 is: 131,438.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,790.20 : 288,990.90 = 87,684.60 : x
  2. Step 2: Convert to fraction form
    192,790.20/288,990.90 = 87,684.60/x
  3. Step 3: Cross multiply
    192,790.20x = 288,990.90 × 87,684.60
  4. Step 4: Simplify right side
    192,790.20x = 25,340,051,470.14
  5. Step 5: Solve for x
    x = 25,340,051,470.14/192,790.20
  6. Step 6: Final answer
    x = 131,438.48

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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.