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Finding the Fourth Proportional to 74,446.39, 111,688.38 and 21,855.88

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Solution

The fourth proportional to 74,446.39, 111,688.38 and 21,855.88 is: 32,789.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,446.39 : 111,688.38 = 21,855.88 : x
  2. Step 2: Convert to fraction form
    74,446.39/111,688.38 = 21,855.88/x
  3. Step 3: Cross multiply
    74,446.39x = 111,688.38 × 21,855.88
  4. Step 4: Simplify right side
    74,446.39x = 2,441,047,372.77
  5. Step 5: Solve for x
    x = 2,441,047,372.77/74,446.39
  6. Step 6: Final answer
    x = 32,789.33

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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.