Home / 258,945.20-387,687.42-137,089.64

Finding the Fourth Proportional to 258,945.20, 387,687.42 and 137,089.64

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Solution

The fourth proportional to 258,945.20, 387,687.42 and 137,089.64 is: 205,247.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,945.20 : 387,687.42 = 137,089.64 : x
  2. Step 2: Convert to fraction form
    258,945.20/387,687.42 = 137,089.64/x
  3. Step 3: Cross multiply
    258,945.20x = 387,687.42 × 137,089.64
  4. Step 4: Simplify right side
    258,945.20x = 53,147,928,840.33
  5. Step 5: Solve for x
    x = 53,147,928,840.33/258,945.20
  6. Step 6: Final answer
    x = 205,247.79

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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.