Home / 80,986.28-121,496.68-28,398.92

Finding the Fourth Proportional to 80,986.28, 121,496.68 and 28,398.92

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Solution

The fourth proportional to 80,986.28, 121,496.68 and 28,398.92 is: 42,604.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,986.28 : 121,496.68 = 28,398.92 : x
  2. Step 2: Convert to fraction form
    80,986.28/121,496.68 = 28,398.92/x
  3. Step 3: Cross multiply
    80,986.28x = 121,496.68 × 28,398.92
  4. Step 4: Simplify right side
    80,986.28x = 3,450,374,495.59
  5. Step 5: Solve for x
    x = 3,450,374,495.59/80,986.28
  6. Step 6: Final answer
    x = 42,604.43

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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.