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Finding the Fourth Proportional to 48,628.87, 72,889.09 and 20,540.50

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Solution

The fourth proportional to 48,628.87, 72,889.09 and 20,540.50 is: 30,787.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,628.87 : 72,889.09 = 20,540.50 : x
  2. Step 2: Convert to fraction form
    48,628.87/72,889.09 = 20,540.50/x
  3. Step 3: Cross multiply
    48,628.87x = 72,889.09 × 20,540.50
  4. Step 4: Simplify right side
    48,628.87x = 1,497,178,353.15
  5. Step 5: Solve for x
    x = 1,497,178,353.15/48,628.87
  6. Step 6: Final answer
    x = 30,787.85

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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.