Home / 78,942.25-109,028.60-61,251.85

Finding the Fourth Proportional to 78,942.25, 109,028.60 and 61,251.85

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Solution

The fourth proportional to 78,942.25, 109,028.60 and 61,251.85 is: 84,596.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,942.25 : 109,028.60 = 61,251.85 : x
  2. Step 2: Convert to fraction form
    78,942.25/109,028.60 = 61,251.85/x
  3. Step 3: Cross multiply
    78,942.25x = 109,028.60 × 61,251.85
  4. Step 4: Simplify right side
    78,942.25x = 6,678,203,452.91
  5. Step 5: Solve for x
    x = 6,678,203,452.91/78,942.25
  6. Step 6: Final answer
    x = 84,596.06

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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.