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Finding the Fourth Proportional to 57,990.01, 86,998.86 and 20,553.36

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Solution

The fourth proportional to 57,990.01, 86,998.86 and 20,553.36 is: 30,834.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,990.01 : 86,998.86 = 20,553.36 : x
  2. Step 2: Convert to fraction form
    57,990.01/86,998.86 = 20,553.36/x
  3. Step 3: Cross multiply
    57,990.01x = 86,998.86 × 20,553.36
  4. Step 4: Simplify right side
    57,990.01x = 1,788,118,685.27
  5. Step 5: Solve for x
    x = 1,788,118,685.27/57,990.01
  6. Step 6: Final answer
    x = 30,834.94

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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.