Home / 258,922.24-388,385.92-81,425.28

Finding the Fourth Proportional to 258,922.24, 388,385.92 and 81,425.28

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Solution

The fourth proportional to 258,922.24, 388,385.92 and 81,425.28 is: 122,138.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,922.24 : 388,385.92 = 81,425.28 : x
  2. Step 2: Convert to fraction form
    258,922.24/388,385.92 = 81,425.28/x
  3. Step 3: Cross multiply
    258,922.24x = 388,385.92 × 81,425.28
  4. Step 4: Simplify right side
    258,922.24x = 31,624,432,284.06
  5. Step 5: Solve for x
    x = 31,624,432,284.06/258,922.24
  6. Step 6: Final answer
    x = 122,138.73

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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.