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Finding the Fourth Proportional to 68,959.44, 103,419.12 and 31,499.64

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Solution

The fourth proportional to 68,959.44, 103,419.12 and 31,499.64 is: 47,240.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,959.44 : 103,419.12 = 31,499.64 : x
  2. Step 2: Convert to fraction form
    68,959.44/103,419.12 = 31,499.64/x
  3. Step 3: Cross multiply
    68,959.44x = 103,419.12 × 31,499.64
  4. Step 4: Simplify right side
    68,959.44x = 3,257,665,049.12
  5. Step 5: Solve for x
    x = 3,257,665,049.12/68,959.44
  6. Step 6: Final answer
    x = 47,240.31

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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.