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Finding the Fourth Proportional to 57,785.82, 86,674.41 and 20,849.82

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Solution

The fourth proportional to 57,785.82, 86,674.41 and 20,849.82 is: 31,273.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,785.82 : 86,674.41 = 20,849.82 : x
  2. Step 2: Convert to fraction form
    57,785.82/86,674.41 = 20,849.82/x
  3. Step 3: Cross multiply
    57,785.82x = 86,674.41 × 20,849.82
  4. Step 4: Simplify right side
    57,785.82x = 1,807,145,847.11
  5. Step 5: Solve for x
    x = 1,807,145,847.11/57,785.82
  6. Step 6: Final answer
    x = 31,273.17

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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.