Home / 78,414.20-117,621.30-25,825.40

Finding the Fourth Proportional to 78,414.20, 117,621.30 and 25,825.40

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Solution

The fourth proportional to 78,414.20, 117,621.30 and 25,825.40 is: 38,738.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,414.20 : 117,621.30 = 25,825.40 : x
  2. Step 2: Convert to fraction form
    78,414.20/117,621.30 = 25,825.40/x
  3. Step 3: Cross multiply
    78,414.20x = 117,621.30 × 25,825.40
  4. Step 4: Simplify right side
    78,414.20x = 3,037,617,121.02
  5. Step 5: Solve for x
    x = 3,037,617,121.02/78,414.20
  6. Step 6: Final answer
    x = 38,738.10

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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.