Home / 80,912.00-120,412.67-78,217.97

Finding the Fourth Proportional to 80,912.00, 120,412.67 and 78,217.97

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Solution

The fourth proportional to 80,912.00, 120,412.67 and 78,217.97 is: 116,403.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,912.00 : 120,412.67 = 78,217.97 : x
  2. Step 2: Convert to fraction form
    80,912.00/120,412.67 = 78,217.97/x
  3. Step 3: Cross multiply
    80,912.00x = 120,412.67 × 78,217.97
  4. Step 4: Simplify right side
    80,912.00x = 9,418,433,616.53
  5. Step 5: Solve for x
    x = 9,418,433,616.53/80,912.00
  6. Step 6: Final answer
    x = 116,403.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.