Home / 78,286.96-117,405.87-25,684.12

Finding the Fourth Proportional to 78,286.96, 117,405.87 and 25,684.12

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Solution

The fourth proportional to 78,286.96, 117,405.87 and 25,684.12 is: 38,518.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,286.96 : 117,405.87 = 25,684.12 : x
  2. Step 2: Convert to fraction form
    78,286.96/117,405.87 = 25,684.12/x
  3. Step 3: Cross multiply
    78,286.96x = 117,405.87 × 25,684.12
  4. Step 4: Simplify right side
    78,286.96x = 3,015,466,453.78
  5. Step 5: Solve for x
    x = 3,015,466,453.78/78,286.96
  6. Step 6: Final answer
    x = 38,518.12

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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.