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Finding the Fourth Proportional to 82,424.80, 123,896.40 and 80,869.60

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Solution

The fourth proportional to 82,424.80, 123,896.40 and 80,869.60 is: 121,558.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,424.80 : 123,896.40 = 80,869.60 : x
  2. Step 2: Convert to fraction form
    82,424.80/123,896.40 = 80,869.60/x
  3. Step 3: Cross multiply
    82,424.80x = 123,896.40 × 80,869.60
  4. Step 4: Simplify right side
    82,424.80x = 10,019,452,309.44
  5. Step 5: Solve for x
    x = 10,019,452,309.44/82,424.80
  6. Step 6: Final answer
    x = 121,558.71

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1.5x scale

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.