Home / 259,125.39-388,669.33-81,683.19

Finding the Fourth Proportional to 259,125.39, 388,669.33 and 81,683.19

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Solution

The fourth proportional to 259,125.39, 388,669.33 and 81,683.19 is: 122,518.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,125.39 : 388,669.33 = 81,683.19 : x
  2. Step 2: Convert to fraction form
    259,125.39/388,669.33 = 81,683.19/x
  3. Step 3: Cross multiply
    259,125.39x = 388,669.33 × 81,683.19
  4. Step 4: Simplify right side
    259,125.39x = 31,747,750,729.56
  5. Step 5: Solve for x
    x = 31,747,750,729.56/259,125.39
  6. Step 6: Final answer
    x = 122,518.87

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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.