Home / 81,338.26-121,983.92-28,028.06

Finding the Fourth Proportional to 81,338.26, 121,983.92 and 28,028.06

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Solution

The fourth proportional to 81,338.26, 121,983.92 and 28,028.06 is: 42,034.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,338.26 : 121,983.92 = 28,028.06 : x
  2. Step 2: Convert to fraction form
    81,338.26/121,983.92 = 28,028.06/x
  3. Step 3: Cross multiply
    81,338.26x = 121,983.92 × 28,028.06
  4. Step 4: Simplify right side
    81,338.26x = 3,418,972,628.80
  5. Step 5: Solve for x
    x = 3,418,972,628.80/81,338.26
  6. Step 6: Final answer
    x = 42,034.00

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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.