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Finding the Fourth Proportional to 78,517.80, 117,719.28 and 25,179.41

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Solution

The fourth proportional to 78,517.80, 117,719.28 and 25,179.41 is: 37,750.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,517.80 : 117,719.28 = 25,179.41 : x
  2. Step 2: Convert to fraction form
    78,517.80/117,719.28 = 25,179.41/x
  3. Step 3: Cross multiply
    78,517.80x = 117,719.28 × 25,179.41
  4. Step 4: Simplify right side
    78,517.80x = 2,964,102,558.49
  5. Step 5: Solve for x
    x = 2,964,102,558.49/78,517.80
  6. Step 6: Final answer
    x = 37,750.71

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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.