Home / 258,729.87-388,067.49-69,209.36

Finding the Fourth Proportional to 258,729.87, 388,067.49 and 69,209.36

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Solution

The fourth proportional to 258,729.87, 388,067.49 and 69,209.36 is: 103,806.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,729.87 : 388,067.49 = 69,209.36 : x
  2. Step 2: Convert to fraction form
    258,729.87/388,067.49 = 69,209.36/x
  3. Step 3: Cross multiply
    258,729.87x = 388,067.49 × 69,209.36
  4. Step 4: Simplify right side
    258,729.87x = 26,857,903,518.04
  5. Step 5: Solve for x
    x = 26,857,903,518.04/258,729.87
  6. Step 6: Final answer
    x = 103,806.74

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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.