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Finding the Fourth Proportional to 259,673.79, 389,549.57 and 82,121.79

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Solution

The fourth proportional to 259,673.79, 389,549.57 and 82,121.79 is: 123,194.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,673.79 : 389,549.57 = 82,121.79 : x
  2. Step 2: Convert to fraction form
    259,673.79/389,549.57 = 82,121.79/x
  3. Step 3: Cross multiply
    259,673.79x = 389,549.57 × 82,121.79
  4. Step 4: Simplify right side
    259,673.79x = 31,990,507,571.52
  5. Step 5: Solve for x
    x = 31,990,507,571.52/259,673.79
  6. Step 6: Final answer
    x = 123,194.98

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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.