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Finding the Fourth Proportional to 259,662.71, 389,455.09 and 82,146.66

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Solution

The fourth proportional to 259,662.71, 389,455.09 and 82,146.66 is: 123,207.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,662.71 : 389,455.09 = 82,146.66 : x
  2. Step 2: Convert to fraction form
    259,662.71/389,455.09 = 82,146.66/x
  3. Step 3: Cross multiply
    259,662.71x = 389,455.09 × 82,146.66
  4. Step 4: Simplify right side
    259,662.71x = 31,992,433,197.68
  5. Step 5: Solve for x
    x = 31,992,433,197.68/259,662.71
  6. Step 6: Final answer
    x = 123,207.65

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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.