Home / 78,828.38-108,785.45-43,020.68

Finding the Fourth Proportional to 78,828.38, 108,785.45 and 43,020.68

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Solution

The fourth proportional to 78,828.38, 108,785.45 and 43,020.68 is: 59,369.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,828.38 : 108,785.45 = 43,020.68 : x
  2. Step 2: Convert to fraction form
    78,828.38/108,785.45 = 43,020.68/x
  3. Step 3: Cross multiply
    78,828.38x = 108,785.45 × 43,020.68
  4. Step 4: Simplify right side
    78,828.38x = 4,680,023,596.73
  5. Step 5: Solve for x
    x = 4,680,023,596.73/78,828.38
  6. Step 6: Final answer
    x = 59,369.78

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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.