Home / 80,917.15-111,713.50-71,939.81

Finding the Fourth Proportional to 80,917.15, 111,713.50 and 71,939.81

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Solution

The fourth proportional to 80,917.15, 111,713.50 and 71,939.81 is: 99,319.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,917.15 : 111,713.50 = 71,939.81 : x
  2. Step 2: Convert to fraction form
    80,917.15/111,713.50 = 71,939.81/x
  3. Step 3: Cross multiply
    80,917.15x = 111,713.50 × 71,939.81
  4. Step 4: Simplify right side
    80,917.15x = 8,036,647,964.44
  5. Step 5: Solve for x
    x = 8,036,647,964.44/80,917.15
  6. Step 6: Final answer
    x = 99,319.46

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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.