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Finding the Fourth Proportional to 68,997.28, 103,568.30 and 61,150

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Solution

The fourth proportional to 68,997.28, 103,568.30 and 61,150 is: 91,789.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,997.28 : 103,568.30 = 61,150 : x
  2. Step 2: Convert to fraction form
    68,997.28/103,568.30 = 61,150/x
  3. Step 3: Cross multiply
    68,997.28x = 103,568.30 × 61,150
  4. Step 4: Simplify right side
    68,997.28x = 6,333,201,545
  5. Step 5: Solve for x
    x = 6,333,201,545/68,997.28
  6. Step 6: Final answer
    x = 91,789.15

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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.