Home / 82,121.10-123,035.85-76,872.30

Finding the Fourth Proportional to 82,121.10, 123,035.85 and 76,872.30

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Solution

The fourth proportional to 82,121.10, 123,035.85 and 76,872.30 is: 115,171.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,121.10 : 123,035.85 = 76,872.30 : x
  2. Step 2: Convert to fraction form
    82,121.10/123,035.85 = 76,872.30/x
  3. Step 3: Cross multiply
    82,121.10x = 123,035.85 × 76,872.30
  4. Step 4: Simplify right side
    82,121.10x = 9,458,048,771.96
  5. Step 5: Solve for x
    x = 9,458,048,771.96/82,121.10
  6. Step 6: Final answer
    x = 115,171.97

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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.