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Finding the Fourth Proportional to 69,121.52, 103,722.60 and 29,138.07

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Solution

The fourth proportional to 69,121.52, 103,722.60 and 29,138.07 is: 43,724.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,121.52 : 103,722.60 = 29,138.07 : x
  2. Step 2: Convert to fraction form
    69,121.52/103,722.60 = 29,138.07/x
  3. Step 3: Cross multiply
    69,121.52x = 103,722.60 × 29,138.07
  4. Step 4: Simplify right side
    69,121.52x = 3,022,276,379.38
  5. Step 5: Solve for x
    x = 3,022,276,379.38/69,121.52
  6. Step 6: Final answer
    x = 43,724.10

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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.