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Finding the Fourth Proportional to 71,378.53, 107,073.26 and 18,787.25

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Solution

The fourth proportional to 71,378.53, 107,073.26 and 18,787.25 is: 28,182.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,378.53 : 107,073.26 = 18,787.25 : x
  2. Step 2: Convert to fraction form
    71,378.53/107,073.26 = 18,787.25/x
  3. Step 3: Cross multiply
    71,378.53x = 107,073.26 × 18,787.25
  4. Step 4: Simplify right side
    71,378.53x = 2,011,612,103.94
  5. Step 5: Solve for x
    x = 2,011,612,103.94/71,378.53
  6. Step 6: Final answer
    x = 28,182.31

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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.