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Finding the Fourth Proportional to 68,896.78, 103,345.17 and 45,517.75

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Solution

The fourth proportional to 68,896.78, 103,345.17 and 45,517.75 is: 68,276.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,896.78 : 103,345.17 = 45,517.75 : x
  2. Step 2: Convert to fraction form
    68,896.78/103,345.17 = 45,517.75/x
  3. Step 3: Cross multiply
    68,896.78x = 103,345.17 × 45,517.75
  4. Step 4: Simplify right side
    68,896.78x = 4,704,039,182.71
  5. Step 5: Solve for x
    x = 4,704,039,182.71/68,896.78
  6. Step 6: Final answer
    x = 68,276.62

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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.