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Finding the Fourth Proportional to 258,370.92, 387,563.67 and 71,382.42

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Solution

The fourth proportional to 258,370.92, 387,563.67 and 71,382.42 is: 107,075.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,370.92 : 387,563.67 = 71,382.42 : x
  2. Step 2: Convert to fraction form
    258,370.92/387,563.67 = 71,382.42/x
  3. Step 3: Cross multiply
    258,370.92x = 387,563.67 × 71,382.42
  4. Step 4: Simplify right side
    258,370.92x = 27,665,232,668.68
  5. Step 5: Solve for x
    x = 27,665,232,668.68/258,370.92
  6. Step 6: Final answer
    x = 107,075.64

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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.