Home / 258,453.43-387,636.39-71,421.19

Finding the Fourth Proportional to 258,453.43, 387,636.39 and 71,421.19

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Solution

The fourth proportional to 258,453.43, 387,636.39 and 71,421.19 is: 107,119.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,453.43 : 387,636.39 = 71,421.19 : x
  2. Step 2: Convert to fraction form
    258,453.43/387,636.39 = 71,421.19/x
  3. Step 3: Cross multiply
    258,453.43x = 387,636.39 × 71,421.19
  4. Step 4: Simplify right side
    258,453.43x = 27,685,451,292.01
  5. Step 5: Solve for x
    x = 27,685,451,292.01/258,453.43
  6. Step 6: Final answer
    x = 107,119.69

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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.