Home / 80,975.71-121,517.77-28,385.17

Finding the Fourth Proportional to 80,975.71, 121,517.77 and 28,385.17

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Solution

The fourth proportional to 80,975.71, 121,517.77 and 28,385.17 is: 42,596.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,975.71 : 121,517.77 = 28,385.17 : x
  2. Step 2: Convert to fraction form
    80,975.71/121,517.77 = 28,385.17/x
  3. Step 3: Cross multiply
    80,975.71x = 121,517.77 × 28,385.17
  4. Step 4: Simplify right side
    80,975.71x = 3,449,302,559.47
  5. Step 5: Solve for x
    x = 3,449,302,559.47/80,975.71
  6. Step 6: Final answer
    x = 42,596.76

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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.