Home / 81,338.76-121,984.67-28,028.56

Finding the Fourth Proportional to 81,338.76, 121,984.67 and 28,028.56

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Solution

The fourth proportional to 81,338.76, 121,984.67 and 28,028.56 is: 42,034.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,338.76 : 121,984.67 = 28,028.56 : x
  2. Step 2: Convert to fraction form
    81,338.76/121,984.67 = 28,028.56/x
  3. Step 3: Cross multiply
    81,338.76x = 121,984.67 × 28,028.56
  4. Step 4: Simplify right side
    81,338.76x = 3,419,054,642.18
  5. Step 5: Solve for x
    x = 3,419,054,642.18/81,338.76
  6. Step 6: Final answer
    x = 42,034.75

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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.