Home / 80,116.56-120,715.69-66,382.20

Finding the Fourth Proportional to 80,116.56, 120,715.69 and 66,382.20

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Solution

The fourth proportional to 80,116.56, 120,715.69 and 66,382.20 is: 100,021.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,116.56 : 120,715.69 = 66,382.20 : x
  2. Step 2: Convert to fraction form
    80,116.56/120,715.69 = 66,382.20/x
  3. Step 3: Cross multiply
    80,116.56x = 120,715.69 × 66,382.20
  4. Step 4: Simplify right side
    80,116.56x = 8,013,373,076.72
  5. Step 5: Solve for x
    x = 8,013,373,076.72/80,116.56
  6. Step 6: Final answer
    x = 100,021.43

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.