Home / 78,815.76-108,781.94-48,194.09

Finding the Fourth Proportional to 78,815.76, 108,781.94 and 48,194.09

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Solution

The fourth proportional to 78,815.76, 108,781.94 and 48,194.09 is: 66,517.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,815.76 : 108,781.94 = 48,194.09 : x
  2. Step 2: Convert to fraction form
    78,815.76/108,781.94 = 48,194.09/x
  3. Step 3: Cross multiply
    78,815.76x = 108,781.94 × 48,194.09
  4. Step 4: Simplify right side
    78,815.76x = 5,242,646,606.73
  5. Step 5: Solve for x
    x = 5,242,646,606.73/78,815.76
  6. Step 6: Final answer
    x = 66,517.74

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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.