Home / 80,515.85-111,216.44-61,278.75

Finding the Fourth Proportional to 80,515.85, 111,216.44 and 61,278.75

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Solution

The fourth proportional to 80,515.85, 111,216.44 and 61,278.75 is: 84,644.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,515.85 : 111,216.44 = 61,278.75 : x
  2. Step 2: Convert to fraction form
    80,515.85/111,216.44 = 61,278.75/x
  3. Step 3: Cross multiply
    80,515.85x = 111,216.44 × 61,278.75
  4. Step 4: Simplify right side
    80,515.85x = 6,815,204,575.85
  5. Step 5: Solve for x
    x = 6,815,204,575.85/80,515.85
  6. Step 6: Final answer
    x = 84,644.27

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1.5x scale

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.