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Finding the Fourth Proportional to 69,081.92, 103,622.90 and 19,174.60

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Solution

The fourth proportional to 69,081.92, 103,622.90 and 19,174.60 is: 28,761.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,081.92 : 103,622.90 = 19,174.60 : x
  2. Step 2: Convert to fraction form
    69,081.92/103,622.90 = 19,174.60/x
  3. Step 3: Cross multiply
    69,081.92x = 103,622.90 × 19,174.60
  4. Step 4: Simplify right side
    69,081.92x = 1,986,927,658.34
  5. Step 5: Solve for x
    x = 1,986,927,658.34/69,081.92
  6. Step 6: Final answer
    x = 28,761.91

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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.