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Finding the Fourth Proportional to 68,639.70, 102,959.55 and 29,198.10

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Solution

The fourth proportional to 68,639.70, 102,959.55 and 29,198.10 is: 43,797.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,639.70 : 102,959.55 = 29,198.10 : x
  2. Step 2: Convert to fraction form
    68,639.70/102,959.55 = 29,198.10/x
  3. Step 3: Cross multiply
    68,639.70x = 102,959.55 × 29,198.10
  4. Step 4: Simplify right side
    68,639.70x = 3,006,223,236.86
  5. Step 5: Solve for x
    x = 3,006,223,236.86/68,639.70
  6. Step 6: Final answer
    x = 43,797.15

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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.