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Finding the Fourth Proportional to 57,608.05, 86,399.10 and 20,672.05

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Solution

The fourth proportional to 57,608.05, 86,399.10 and 20,672.05 is: 31,003.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,608.05 : 86,399.10 = 20,672.05 : x
  2. Step 2: Convert to fraction form
    57,608.05/86,399.10 = 20,672.05/x
  3. Step 3: Cross multiply
    57,608.05x = 86,399.10 × 20,672.05
  4. Step 4: Simplify right side
    57,608.05x = 1,786,046,515.16
  5. Step 5: Solve for x
    x = 1,786,046,515.16/57,608.05
  6. Step 6: Final answer
    x = 31,003.42

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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.