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Finding the Fourth Proportional to 192,556.80, 288,921.60 and 87,321.60

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Solution

The fourth proportional to 192,556.80, 288,921.60 and 87,321.60 is: 131,021.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,556.80 : 288,921.60 = 87,321.60 : x
  2. Step 2: Convert to fraction form
    192,556.80/288,921.60 = 87,321.60/x
  3. Step 3: Cross multiply
    192,556.80x = 288,921.60 × 87,321.60
  4. Step 4: Simplify right side
    192,556.80x = 25,229,096,386.56
  5. Step 5: Solve for x
    x = 25,229,096,386.56/192,556.80
  6. Step 6: Final answer
    x = 131,021.58

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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.