Home / 81,028.20-111,816-50,829.78

Finding the Fourth Proportional to 81,028.20, 111,816 and 50,829.78

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Solution

The fourth proportional to 81,028.20, 111,816 and 50,829.78 is: 70,143.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,028.20 : 111,816 = 50,829.78 : x
  2. Step 2: Convert to fraction form
    81,028.20/111,816 = 50,829.78/x
  3. Step 3: Cross multiply
    81,028.20x = 111,816 × 50,829.78
  4. Step 4: Simplify right side
    81,028.20x = 5,683,582,680.48
  5. Step 5: Solve for x
    x = 5,683,582,680.48/81,028.20
  6. Step 6: Final answer
    x = 70,143.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.