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Finding the Fourth Proportional to 57,274.92, 85,860.54 and 20,330.28

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Solution

The fourth proportional to 57,274.92, 85,860.54 and 20,330.28 is: 30,477.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,274.92 : 85,860.54 = 20,330.28 : x
  2. Step 2: Convert to fraction form
    57,274.92/85,860.54 = 20,330.28/x
  3. Step 3: Cross multiply
    57,274.92x = 85,860.54 × 20,330.28
  4. Step 4: Simplify right side
    57,274.92x = 1,745,568,819.15
  5. Step 5: Solve for x
    x = 1,745,568,819.15/57,274.92
  6. Step 6: Final answer
    x = 30,477.02

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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.