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Finding the Fourth Proportional to 57,740.56, 86,620.56 and 20,299.12

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Solution

The fourth proportional to 57,740.56, 86,620.56 and 20,299.12 is: 30,452.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,740.56 : 86,620.56 = 20,299.12 : x
  2. Step 2: Convert to fraction form
    57,740.56/86,620.56 = 20,299.12/x
  3. Step 3: Cross multiply
    57,740.56x = 86,620.56 × 20,299.12
  4. Step 4: Simplify right side
    57,740.56x = 1,758,321,141.91
  5. Step 5: Solve for x
    x = 1,758,321,141.91/57,740.56
  6. Step 6: Final answer
    x = 30,452.10

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1.5x scale

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.