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Finding the Fourth Proportional to 57,556.50, 86,373.90 and 20,620.50

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Solution

The fourth proportional to 57,556.50, 86,373.90 and 20,620.50 is: 30,944.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,556.50 : 86,373.90 = 20,620.50 : x
  2. Step 2: Convert to fraction form
    57,556.50/86,373.90 = 20,620.50/x
  3. Step 3: Cross multiply
    57,556.50x = 86,373.90 × 20,620.50
  4. Step 4: Simplify right side
    57,556.50x = 1,781,073,004.95
  5. Step 5: Solve for x
    x = 1,781,073,004.95/57,556.50
  6. Step 6: Final answer
    x = 30,944.78

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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.