Home / 78,391.39-108,138.65-49,660.36

Finding the Fourth Proportional to 78,391.39, 108,138.65 and 49,660.36

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Solution

The fourth proportional to 78,391.39, 108,138.65 and 49,660.36 is: 68,505.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,391.39 : 108,138.65 = 49,660.36 : x
  2. Step 2: Convert to fraction form
    78,391.39/108,138.65 = 49,660.36/x
  3. Step 3: Cross multiply
    78,391.39x = 108,138.65 × 49,660.36
  4. Step 4: Simplify right side
    78,391.39x = 5,370,204,288.91
  5. Step 5: Solve for x
    x = 5,370,204,288.91/78,391.39
  6. Step 6: Final answer
    x = 68,505.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.