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Finding the Fourth Proportional to 57,866.30, 86,806.42 and 20,418.68

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Solution

The fourth proportional to 57,866.30, 86,806.42 and 20,418.68 is: 30,630.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,866.30 : 86,806.42 = 20,418.68 : x
  2. Step 2: Convert to fraction form
    57,866.30/86,806.42 = 20,418.68/x
  3. Step 3: Cross multiply
    57,866.30x = 86,806.42 × 20,418.68
  4. Step 4: Simplify right side
    57,866.30x = 1,772,472,511.93
  5. Step 5: Solve for x
    x = 1,772,472,511.93/57,866.30
  6. Step 6: Final answer
    x = 30,630.48

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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.