Home / 57,115.80-78,821.37-31,965.30

Finding the Fourth Proportional to 57,115.80, 78,821.37 and 31,965.30

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Solution

The fourth proportional to 57,115.80, 78,821.37 and 31,965.30 is: 44,112.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,115.80 : 78,821.37 = 31,965.30 : x
  2. Step 2: Convert to fraction form
    57,115.80/78,821.37 = 31,965.30/x
  3. Step 3: Cross multiply
    57,115.80x = 78,821.37 × 31,965.30
  4. Step 4: Simplify right side
    57,115.80x = 2,519,548,738.46
  5. Step 5: Solve for x
    x = 2,519,548,738.46/57,115.80
  6. Step 6: Final answer
    x = 44,112.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.