Home / 78,171.38-117,269.40-25,568.54

Finding the Fourth Proportional to 78,171.38, 117,269.40 and 25,568.54

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Solution

The fourth proportional to 78,171.38, 117,269.40 and 25,568.54 is: 38,356.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,171.38 : 117,269.40 = 25,568.54 : x
  2. Step 2: Convert to fraction form
    78,171.38/117,269.40 = 25,568.54/x
  3. Step 3: Cross multiply
    78,171.38x = 117,269.40 × 25,568.54
  4. Step 4: Simplify right side
    78,171.38x = 2,998,407,344.68
  5. Step 5: Solve for x
    x = 2,998,407,344.68/78,171.38
  6. Step 6: Final answer
    x = 38,356.84

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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.