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Finding the Fourth Proportional to 69,039.95, 103,531.37 and 21,639.15

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Solution

The fourth proportional to 69,039.95, 103,531.37 and 21,639.15 is: 32,449.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,039.95 : 103,531.37 = 21,639.15 : x
  2. Step 2: Convert to fraction form
    69,039.95/103,531.37 = 21,639.15/x
  3. Step 3: Cross multiply
    69,039.95x = 103,531.37 × 21,639.15
  4. Step 4: Simplify right side
    69,039.95x = 2,240,330,736.94
  5. Step 5: Solve for x
    x = 2,240,330,736.94/69,039.95
  6. Step 6: Final answer
    x = 32,449.78

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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.