Home / 81,052.20-121,286.70-54,808.20

Finding the Fourth Proportional to 81,052.20, 121,286.70 and 54,808.20

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Solution

The fourth proportional to 81,052.20, 121,286.70 and 54,808.20 is: 82,015.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,052.20 : 121,286.70 = 54,808.20 : x
  2. Step 2: Convert to fraction form
    81,052.20/121,286.70 = 54,808.20/x
  3. Step 3: Cross multiply
    81,052.20x = 121,286.70 × 54,808.20
  4. Step 4: Simplify right side
    81,052.20x = 6,647,505,710.94
  5. Step 5: Solve for x
    x = 6,647,505,710.94/81,052.20
  6. Step 6: Final answer
    x = 82,015.12

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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.