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Finding the Fourth Proportional to 80,728, 121,093.28 and 22,360

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Solution

The fourth proportional to 80,728, 121,093.28 and 22,360 is: 33,540.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,728 : 121,093.28 = 22,360 : x
  2. Step 2: Convert to fraction form
    80,728/121,093.28 = 22,360/x
  3. Step 3: Cross multiply
    80,728x = 121,093.28 × 22,360
  4. Step 4: Simplify right side
    80,728x = 2,707,645,740.80
  5. Step 5: Solve for x
    x = 2,707,645,740.80/80,728
  6. Step 6: Final answer
    x = 33,540.35

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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.