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Finding the Fourth Proportional to 192,860.72, 289,336.95 and 80,478.49

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Solution

The fourth proportional to 192,860.72, 289,336.95 and 80,478.49 is: 120,736.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,860.72 : 289,336.95 = 80,478.49 : x
  2. Step 2: Convert to fraction form
    192,860.72/289,336.95 = 80,478.49/x
  3. Step 3: Cross multiply
    192,860.72x = 289,336.95 × 80,478.49
  4. Step 4: Simplify right side
    192,860.72x = 23,285,400,113.86
  5. Step 5: Solve for x
    x = 23,285,400,113.86/192,860.72
  6. Step 6: Final answer
    x = 120,736.87

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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.