Home / 78,285.44-117,441.20-25,680.80

Finding the Fourth Proportional to 78,285.44, 117,441.20 and 25,680.80

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Solution

The fourth proportional to 78,285.44, 117,441.20 and 25,680.80 is: 38,525.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,285.44 : 117,441.20 = 25,680.80 : x
  2. Step 2: Convert to fraction form
    78,285.44/117,441.20 = 25,680.80/x
  3. Step 3: Cross multiply
    78,285.44x = 117,441.20 × 25,680.80
  4. Step 4: Simplify right side
    78,285.44x = 3,015,983,968.96
  5. Step 5: Solve for x
    x = 3,015,983,968.96/78,285.44
  6. Step 6: Final answer
    x = 38,525.48

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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.