Home / 85,838.20-128,757.30-82,557.70

Finding the Fourth Proportional to 85,838.20, 128,757.30 and 82,557.70

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Solution

The fourth proportional to 85,838.20, 128,757.30 and 82,557.70 is: 123,836.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,838.20 : 128,757.30 = 82,557.70 : x
  2. Step 2: Convert to fraction form
    85,838.20/128,757.30 = 82,557.70/x
  3. Step 3: Cross multiply
    85,838.20x = 128,757.30 × 82,557.70
  4. Step 4: Simplify right side
    85,838.20x = 10,629,906,546.21
  5. Step 5: Solve for x
    x = 10,629,906,546.21/85,838.20
  6. Step 6: Final answer
    x = 123,836.55

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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.