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Finding the Fourth Proportional to 57,940.30, 86,912.07 and 20,495.08

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Solution

The fourth proportional to 57,940.30, 86,912.07 and 20,495.08 is: 30,743.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,940.30 : 86,912.07 = 20,495.08 : x
  2. Step 2: Convert to fraction form
    57,940.30/86,912.07 = 20,495.08/x
  3. Step 3: Cross multiply
    57,940.30x = 86,912.07 × 20,495.08
  4. Step 4: Simplify right side
    57,940.30x = 1,781,269,827.62
  5. Step 5: Solve for x
    x = 1,781,269,827.62/57,940.30
  6. Step 6: Final answer
    x = 30,743.19

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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.