Home / 80,464.10-120,696.15-43,139.30

Finding the Fourth Proportional to 80,464.10, 120,696.15 and 43,139.30

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Solution

The fourth proportional to 80,464.10, 120,696.15 and 43,139.30 is: 64,708.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,464.10 : 120,696.15 = 43,139.30 : x
  2. Step 2: Convert to fraction form
    80,464.10/120,696.15 = 43,139.30/x
  3. Step 3: Cross multiply
    80,464.10x = 120,696.15 × 43,139.30
  4. Step 4: Simplify right side
    80,464.10x = 5,206,747,423.70
  5. Step 5: Solve for x
    x = 5,206,747,423.70/80,464.10
  6. Step 6: Final answer
    x = 64,708.95

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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.