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Finding the Fourth Proportional to 69,086, 103,631.70 and 21,733.40

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Solution

The fourth proportional to 69,086, 103,631.70 and 21,733.40 is: 32,600.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,086 : 103,631.70 = 21,733.40 : x
  2. Step 2: Convert to fraction form
    69,086/103,631.70 = 21,733.40/x
  3. Step 3: Cross multiply
    69,086x = 103,631.70 × 21,733.40
  4. Step 4: Simplify right side
    69,086x = 2,252,269,188.78
  5. Step 5: Solve for x
    x = 2,252,269,188.78/69,086
  6. Step 6: Final answer
    x = 32,600.95

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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.