Home / 258,795.25-387,953.78-138,936.56

Finding the Fourth Proportional to 258,795.25, 387,953.78 and 138,936.56

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Solution

The fourth proportional to 258,795.25, 387,953.78 and 138,936.56 is: 208,276.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,795.25 : 387,953.78 = 138,936.56 : x
  2. Step 2: Convert to fraction form
    258,795.25/387,953.78 = 138,936.56/x
  3. Step 3: Cross multiply
    258,795.25x = 387,953.78 × 138,936.56
  4. Step 4: Simplify right side
    258,795.25x = 53,900,960,997.75
  5. Step 5: Solve for x
    x = 53,900,960,997.75/258,795.25
  6. Step 6: Final answer
    x = 208,276.47

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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.