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Finding the Fourth Proportional to 82,163.60, 123,245.40 and 26,765.20

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Solution

The fourth proportional to 82,163.60, 123,245.40 and 26,765.20 is: 40,147.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,163.60 : 123,245.40 = 26,765.20 : x
  2. Step 2: Convert to fraction form
    82,163.60/123,245.40 = 26,765.20/x
  3. Step 3: Cross multiply
    82,163.60x = 123,245.40 × 26,765.20
  4. Step 4: Simplify right side
    82,163.60x = 3,298,687,780.08
  5. Step 5: Solve for x
    x = 3,298,687,780.08/82,163.60
  6. Step 6: Final answer
    x = 40,147.80

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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.