Home / 80,920.25-121,380.38-25,516.25

Finding the Fourth Proportional to 80,920.25, 121,380.38 and 25,516.25

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Solution

The fourth proportional to 80,920.25, 121,380.38 and 25,516.25 is: 38,274.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,920.25 : 121,380.38 = 25,516.25 : x
  2. Step 2: Convert to fraction form
    80,920.25/121,380.38 = 25,516.25/x
  3. Step 3: Cross multiply
    80,920.25x = 121,380.38 × 25,516.25
  4. Step 4: Simplify right side
    80,920.25x = 3,097,171,993.59
  5. Step 5: Solve for x
    x = 3,097,171,993.59/80,920.25
  6. Step 6: Final answer
    x = 38,274.38

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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.