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Finding the Fourth Proportional to 57,578.80, 86,376.84 and 18,131.80

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Solution

The fourth proportional to 57,578.80, 86,376.84 and 18,131.80 is: 27,200.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,578.80 : 86,376.84 = 18,131.80 : x
  2. Step 2: Convert to fraction form
    57,578.80/86,376.84 = 18,131.80/x
  3. Step 3: Cross multiply
    57,578.80x = 86,376.84 × 18,131.80
  4. Step 4: Simplify right side
    57,578.80x = 1,566,167,587.51
  5. Step 5: Solve for x
    x = 1,566,167,587.51/57,578.80
  6. Step 6: Final answer
    x = 27,200.42

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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.