Home / 128,470.45-192,760.81-49,640.04

Finding the Fourth Proportional to 128,470.45, 192,760.81 and 49,640.04

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Solution

The fourth proportional to 128,470.45, 192,760.81 and 49,640.04 is: 74,481.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,470.45 : 192,760.81 = 49,640.04 : x
  2. Step 2: Convert to fraction form
    128,470.45/192,760.81 = 49,640.04/x
  3. Step 3: Cross multiply
    128,470.45x = 192,760.81 × 49,640.04
  4. Step 4: Simplify right side
    128,470.45x = 9,568,653,106.83
  5. Step 5: Solve for x
    x = 9,568,653,106.83/128,470.45
  6. Step 6: Final answer
    x = 74,481.35

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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.