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Finding the Fourth Proportional to 57,578.84, 86,371.34 and 18,139.04

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Solution

The fourth proportional to 57,578.84, 86,371.34 and 18,139.04 is: 27,209.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,578.84 : 86,371.34 = 18,139.04 : x
  2. Step 2: Convert to fraction form
    57,578.84/86,371.34 = 18,139.04/x
  3. Step 3: Cross multiply
    57,578.84x = 86,371.34 × 18,139.04
  4. Step 4: Simplify right side
    57,578.84x = 1,566,692,668.56
  5. Step 5: Solve for x
    x = 1,566,692,668.56/57,578.84
  6. Step 6: Final answer
    x = 27,209.52

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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.