Home / 80,916.80-121,310.40-34,131.20

Finding the Fourth Proportional to 80,916.80, 121,310.40 and 34,131.20

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Solution

The fourth proportional to 80,916.80, 121,310.40 and 34,131.20 is: 51,169.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,916.80 : 121,310.40 = 34,131.20 : x
  2. Step 2: Convert to fraction form
    80,916.80/121,310.40 = 34,131.20/x
  3. Step 3: Cross multiply
    80,916.80x = 121,310.40 × 34,131.20
  4. Step 4: Simplify right side
    80,916.80x = 4,140,469,524.48
  5. Step 5: Solve for x
    x = 4,140,469,524.48/80,916.80
  6. Step 6: Final answer
    x = 51,169.47

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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.