Home / 84,826.20-126,980.10-66,163.80

Finding the Fourth Proportional to 84,826.20, 126,980.10 and 66,163.80

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Solution

The fourth proportional to 84,826.20, 126,980.10 and 66,163.80 is: 99,043.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,826.20 : 126,980.10 = 66,163.80 : x
  2. Step 2: Convert to fraction form
    84,826.20/126,980.10 = 66,163.80/x
  3. Step 3: Cross multiply
    84,826.20x = 126,980.10 × 66,163.80
  4. Step 4: Simplify right side
    84,826.20x = 8,401,485,940.38
  5. Step 5: Solve for x
    x = 8,401,485,940.38/84,826.20
  6. Step 6: Final answer
    x = 99,043.53

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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.