Home / 258,519.52-387,784.14-81,022.60

Finding the Fourth Proportional to 258,519.52, 387,784.14 and 81,022.60

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Solution

The fourth proportional to 258,519.52, 387,784.14 and 81,022.60 is: 121,535.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,519.52 : 387,784.14 = 81,022.60 : x
  2. Step 2: Convert to fraction form
    258,519.52/387,784.14 = 81,022.60/x
  3. Step 3: Cross multiply
    258,519.52x = 387,784.14 × 81,022.60
  4. Step 4: Simplify right side
    258,519.52x = 31,419,279,261.56
  5. Step 5: Solve for x
    x = 31,419,279,261.56/258,519.52
  6. Step 6: Final answer
    x = 121,535.42

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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.