Home / 81,290.94-111,932.22-71,162.70

Finding the Fourth Proportional to 81,290.94, 111,932.22 and 71,162.70

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Solution

The fourth proportional to 81,290.94, 111,932.22 and 71,162.70 is: 97,986.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,290.94 : 111,932.22 = 71,162.70 : x
  2. Step 2: Convert to fraction form
    81,290.94/111,932.22 = 71,162.70/x
  3. Step 3: Cross multiply
    81,290.94x = 111,932.22 × 71,162.70
  4. Step 4: Simplify right side
    81,290.94x = 7,965,398,992.19
  5. Step 5: Solve for x
    x = 7,965,398,992.19/81,290.94
  6. Step 6: Final answer
    x = 97,986.31

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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.