Home / 80,721.56-121,101.78-25,317.56

Finding the Fourth Proportional to 80,721.56, 121,101.78 and 25,317.56

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Solution

The fourth proportional to 80,721.56, 121,101.78 and 25,317.56 is: 37,982.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,721.56 : 121,101.78 = 25,317.56 : x
  2. Step 2: Convert to fraction form
    80,721.56/121,101.78 = 25,317.56/x
  3. Step 3: Cross multiply
    80,721.56x = 121,101.78 × 25,317.56
  4. Step 4: Simplify right side
    80,721.56x = 3,066,001,978.95
  5. Step 5: Solve for x
    x = 3,066,001,978.95/80,721.56
  6. Step 6: Final answer
    x = 37,982.44

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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.