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Finding the Fourth Proportional to 57,765.60, 86,648.88 and 20,325.96

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Solution

The fourth proportional to 57,765.60, 86,648.88 and 20,325.96 is: 30,489.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,765.60 : 86,648.88 = 20,325.96 : x
  2. Step 2: Convert to fraction form
    57,765.60/86,648.88 = 20,325.96/x
  3. Step 3: Cross multiply
    57,765.60x = 86,648.88 × 20,325.96
  4. Step 4: Simplify right side
    57,765.60x = 1,761,221,668.92
  5. Step 5: Solve for x
    x = 1,761,221,668.92/57,765.60
  6. Step 6: Final answer
    x = 30,489.11

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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.