Home / 78,481.45-117,678.98-25,863.85

Finding the Fourth Proportional to 78,481.45, 117,678.98 and 25,863.85

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Solution

The fourth proportional to 78,481.45, 117,678.98 and 25,863.85 is: 38,781.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,481.45 : 117,678.98 = 25,863.85 : x
  2. Step 2: Convert to fraction form
    78,481.45/117,678.98 = 25,863.85/x
  3. Step 3: Cross multiply
    78,481.45x = 117,678.98 × 25,863.85
  4. Step 4: Simplify right side
    78,481.45x = 3,043,631,357.55
  5. Step 5: Solve for x
    x = 3,043,631,357.55/78,481.45
  6. Step 6: Final answer
    x = 38,781.54

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1.5x scale

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.