Home / 78,375.91-108,175.97-51,520.89

Finding the Fourth Proportional to 78,375.91, 108,175.97 and 51,520.89

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Solution

The fourth proportional to 78,375.91, 108,175.97 and 51,520.89 is: 71,110.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,375.91 : 108,175.97 = 51,520.89 : x
  2. Step 2: Convert to fraction form
    78,375.91/108,175.97 = 51,520.89/x
  3. Step 3: Cross multiply
    78,375.91x = 108,175.97 × 51,520.89
  4. Step 4: Simplify right side
    78,375.91x = 5,573,321,993.41
  5. Step 5: Solve for x
    x = 5,573,321,993.41/78,375.91
  6. Step 6: Final answer
    x = 71,110.14

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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.