Home / 128,399.24-192,441.10-72,121.04

Finding the Fourth Proportional to 128,399.24, 192,441.10 and 72,121.04

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Solution

The fourth proportional to 128,399.24, 192,441.10 and 72,121.04 is: 108,092.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,399.24 : 192,441.10 = 72,121.04 : x
  2. Step 2: Convert to fraction form
    128,399.24/192,441.10 = 72,121.04/x
  3. Step 3: Cross multiply
    128,399.24x = 192,441.10 × 72,121.04
  4. Step 4: Simplify right side
    128,399.24x = 13,879,052,270.74
  5. Step 5: Solve for x
    x = 13,879,052,270.74/128,399.24
  6. Step 6: Final answer
    x = 108,092.95

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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.