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Finding the Fourth Proportional to 57,147.60, 85,721.40 and 17,704.40

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Solution

The fourth proportional to 57,147.60, 85,721.40 and 17,704.40 is: 26,556.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,147.60 : 85,721.40 = 17,704.40 : x
  2. Step 2: Convert to fraction form
    57,147.60/85,721.40 = 17,704.40/x
  3. Step 3: Cross multiply
    57,147.60x = 85,721.40 × 17,704.40
  4. Step 4: Simplify right side
    57,147.60x = 1,517,645,954.16
  5. Step 5: Solve for x
    x = 1,517,645,954.16/57,147.60
  6. Step 6: Final answer
    x = 26,556.60

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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.