Home / 57,161.86-85,754.31-20,251.78

Finding the Fourth Proportional to 57,161.86, 85,754.31 and 20,251.78

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Solution

The fourth proportional to 57,161.86, 85,754.31 and 20,251.78 is: 30,381.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,161.86 : 85,754.31 = 20,251.78 : x
  2. Step 2: Convert to fraction form
    57,161.86/85,754.31 = 20,251.78/x
  3. Step 3: Cross multiply
    57,161.86x = 85,754.31 × 20,251.78
  4. Step 4: Simplify right side
    57,161.86x = 1,736,677,420.17
  5. Step 5: Solve for x
    x = 1,736,677,420.17/57,161.86
  6. Step 6: Final answer
    x = 30,381.75

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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.