Home / 81,270.24-121,910.83-31,350.75

Finding the Fourth Proportional to 81,270.24, 121,910.83 and 31,350.75

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Solution

The fourth proportional to 81,270.24, 121,910.83 and 31,350.75 is: 47,028.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,270.24 : 121,910.83 = 31,350.75 : x
  2. Step 2: Convert to fraction form
    81,270.24/121,910.83 = 31,350.75/x
  3. Step 3: Cross multiply
    81,270.24x = 121,910.83 × 31,350.75
  4. Step 4: Simplify right side
    81,270.24x = 3,821,995,953.62
  5. Step 5: Solve for x
    x = 3,821,995,953.62/81,270.24
  6. Step 6: Final answer
    x = 47,028.24

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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.