Home / 258,608.43-387,919.13-71,621.55

Finding the Fourth Proportional to 258,608.43, 387,919.13 and 71,621.55

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Solution

The fourth proportional to 258,608.43, 387,919.13 and 71,621.55 is: 107,434.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,608.43 : 387,919.13 = 71,621.55 : x
  2. Step 2: Convert to fraction form
    258,608.43/387,919.13 = 71,621.55/x
  3. Step 3: Cross multiply
    258,608.43x = 387,919.13 × 71,621.55
  4. Step 4: Simplify right side
    258,608.43x = 27,783,369,007.14
  5. Step 5: Solve for x
    x = 27,783,369,007.14/258,608.43
  6. Step 6: Final answer
    x = 107,434.12

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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.