Home / 80,842.68-121,262.94-20,871.36

Finding the Fourth Proportional to 80,842.68, 121,262.94 and 20,871.36

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Solution

The fourth proportional to 80,842.68, 121,262.94 and 20,871.36 is: 31,306.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,842.68 : 121,262.94 = 20,871.36 : x
  2. Step 2: Convert to fraction form
    80,842.68/121,262.94 = 20,871.36/x
  3. Step 3: Cross multiply
    80,842.68x = 121,262.94 × 20,871.36
  4. Step 4: Simplify right side
    80,842.68x = 2,530,922,475.40
  5. Step 5: Solve for x
    x = 2,530,922,475.40/80,842.68
  6. Step 6: Final answer
    x = 31,306.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.