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Finding the Fourth Proportional to 69,581.96, 104,372.58 and 16,991.72

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Solution

The fourth proportional to 69,581.96, 104,372.58 and 16,991.72 is: 25,487.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,581.96 : 104,372.58 = 16,991.72 : x
  2. Step 2: Convert to fraction form
    69,581.96/104,372.58 = 16,991.72/x
  3. Step 3: Cross multiply
    69,581.96x = 104,372.58 × 16,991.72
  4. Step 4: Simplify right side
    69,581.96x = 1,773,469,655.04
  5. Step 5: Solve for x
    x = 1,773,469,655.04/69,581.96
  6. Step 6: Final answer
    x = 25,487.49

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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.