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Finding the Fourth Proportional to 80,963.88, 121,434.86 and 21,803.12

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Solution

The fourth proportional to 80,963.88, 121,434.86 and 21,803.12 is: 32,701.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,963.88 : 121,434.86 = 21,803.12 : x
  2. Step 2: Convert to fraction form
    80,963.88/121,434.86 = 21,803.12/x
  3. Step 3: Cross multiply
    80,963.88x = 121,434.86 × 21,803.12
  4. Step 4: Simplify right side
    80,963.88x = 2,647,658,824.76
  5. Step 5: Solve for x
    x = 2,647,658,824.76/80,963.88
  6. Step 6: Final answer
    x = 32,701.73

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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.