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Finding the Fourth Proportional to 49,908.60, 74,797.90 and 20,291.88

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Solution

The fourth proportional to 49,908.60, 74,797.90 and 20,291.88 is: 30,411.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,908.60 : 74,797.90 = 20,291.88 : x
  2. Step 2: Convert to fraction form
    49,908.60/74,797.90 = 20,291.88/x
  3. Step 3: Cross multiply
    49,908.60x = 74,797.90 × 20,291.88
  4. Step 4: Simplify right side
    49,908.60x = 1,517,790,011.05
  5. Step 5: Solve for x
    x = 1,517,790,011.05/49,908.60
  6. Step 6: Final answer
    x = 30,411.39

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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.