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Finding the Fourth Proportional to 57,449.79, 86,128.20 and 25,836.70

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Solution

The fourth proportional to 57,449.79, 86,128.20 and 25,836.70 is: 38,734.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,449.79 : 86,128.20 = 25,836.70 : x
  2. Step 2: Convert to fraction form
    57,449.79/86,128.20 = 25,836.70/x
  3. Step 3: Cross multiply
    57,449.79x = 86,128.20 × 25,836.70
  4. Step 4: Simplify right side
    57,449.79x = 2,225,268,464.94
  5. Step 5: Solve for x
    x = 2,225,268,464.94/57,449.79
  6. Step 6: Final answer
    x = 38,734.14

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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.