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Finding the Fourth Proportional to 69,092, 103,640.70 and 21,739.40

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Solution

The fourth proportional to 69,092, 103,640.70 and 21,739.40 is: 32,609.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,092 : 103,640.70 = 21,739.40 : x
  2. Step 2: Convert to fraction form
    69,092/103,640.70 = 21,739.40/x
  3. Step 3: Cross multiply
    69,092x = 103,640.70 × 21,739.40
  4. Step 4: Simplify right side
    69,092x = 2,253,086,633.58
  5. Step 5: Solve for x
    x = 2,253,086,633.58/69,092
  6. Step 6: Final answer
    x = 32,609.95

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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.