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Finding the Fourth Proportional to 68,806.72, 103,135.36 and 28,851.52

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Solution

The fourth proportional to 68,806.72, 103,135.36 and 28,851.52 is: 43,245.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,806.72 : 103,135.36 = 28,851.52 : x
  2. Step 2: Convert to fraction form
    68,806.72/103,135.36 = 28,851.52/x
  3. Step 3: Cross multiply
    68,806.72x = 103,135.36 × 28,851.52
  4. Step 4: Simplify right side
    68,806.72x = 2,975,611,901.75
  5. Step 5: Solve for x
    x = 2,975,611,901.75/68,806.72
  6. Step 6: Final answer
    x = 43,245.95

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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.