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Finding the Fourth Proportional to 57,861.54, 86,816.61 and 20,448.05

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Solution

The fourth proportional to 57,861.54, 86,816.61 and 20,448.05 is: 30,680.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,861.54 : 86,816.61 = 20,448.05 : x
  2. Step 2: Convert to fraction form
    57,861.54/86,816.61 = 20,448.05/x
  3. Step 3: Cross multiply
    57,861.54x = 86,816.61 × 20,448.05
  4. Step 4: Simplify right side
    57,861.54x = 1,775,229,948.03
  5. Step 5: Solve for x
    x = 1,775,229,948.03/57,861.54
  6. Step 6: Final answer
    x = 30,680.66

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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.