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Finding the Fourth Proportional to 57,991.89, 87,001.68 and 20,555.23

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Solution

The fourth proportional to 57,991.89, 87,001.68 and 20,555.23 is: 30,837.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,991.89 : 87,001.68 = 20,555.23 : x
  2. Step 2: Convert to fraction form
    57,991.89/87,001.68 = 20,555.23/x
  3. Step 3: Cross multiply
    57,991.89x = 87,001.68 × 20,555.23
  4. Step 4: Simplify right side
    57,991.89x = 1,788,339,542.79
  5. Step 5: Solve for x
    x = 1,788,339,542.79/57,991.89
  6. Step 6: Final answer
    x = 30,837.75

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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.