Home / 140,380.38-210,716.37-81,331.38

Finding the Fourth Proportional to 140,380.38, 210,716.37 and 81,331.38

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Solution

The fourth proportional to 140,380.38, 210,716.37 and 81,331.38 is: 122,081.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,380.38 : 210,716.37 = 81,331.38 : x
  2. Step 2: Convert to fraction form
    140,380.38/210,716.37 = 81,331.38/x
  3. Step 3: Cross multiply
    140,380.38x = 210,716.37 × 81,331.38
  4. Step 4: Simplify right side
    140,380.38x = 17,137,853,160.69
  5. Step 5: Solve for x
    x = 17,137,853,160.69/140,380.38
  6. Step 6: Final answer
    x = 122,081.54

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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.