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Finding the Fourth Proportional to 68,757.66, 103,119.78 and 28,755

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Solution

The fourth proportional to 68,757.66, 103,119.78 and 28,755 is: 43,125.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,757.66 : 103,119.78 = 28,755 : x
  2. Step 2: Convert to fraction form
    68,757.66/103,119.78 = 28,755/x
  3. Step 3: Cross multiply
    68,757.66x = 103,119.78 × 28,755
  4. Step 4: Simplify right side
    68,757.66x = 2,965,209,273.90
  5. Step 5: Solve for x
    x = 2,965,209,273.90/68,757.66
  6. Step 6: Final answer
    x = 43,125.51

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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.