Home / 239,932.96-331,148-139,389.28

Finding the Fourth Proportional to 239,932.96, 331,148 and 139,389.28

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Solution

The fourth proportional to 239,932.96, 331,148 and 139,389.28 is: 192,380.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,932.96 : 331,148 = 139,389.28 : x
  2. Step 2: Convert to fraction form
    239,932.96/331,148 = 139,389.28/x
  3. Step 3: Cross multiply
    239,932.96x = 331,148 × 139,389.28
  4. Step 4: Simplify right side
    239,932.96x = 46,158,481,293.44
  5. Step 5: Solve for x
    x = 46,158,481,293.44/239,932.96
  6. Step 6: Final answer
    x = 192,380.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.