Home / 128,222.52-192,161.84-99,793.79

Finding the Fourth Proportional to 128,222.52, 192,161.84 and 99,793.79

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Solution

The fourth proportional to 128,222.52, 192,161.84 and 99,793.79 is: 149,556.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,222.52 : 192,161.84 = 99,793.79 : x
  2. Step 2: Convert to fraction form
    128,222.52/192,161.84 = 99,793.79/x
  3. Step 3: Cross multiply
    128,222.52x = 192,161.84 × 99,793.79
  4. Step 4: Simplify right side
    128,222.52x = 19,176,556,847.20
  5. Step 5: Solve for x
    x = 19,176,556,847.20/128,222.52
  6. Step 6: Final answer
    x = 149,556.86

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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.