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Finding the Fourth Proportional to 57,270.40, 85,905.60 and 15,717.40

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Solution

The fourth proportional to 57,270.40, 85,905.60 and 15,717.40 is: 23,576.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,270.40 : 85,905.60 = 15,717.40 : x
  2. Step 2: Convert to fraction form
    57,270.40/85,905.60 = 15,717.40/x
  3. Step 3: Cross multiply
    57,270.40x = 85,905.60 × 15,717.40
  4. Step 4: Simplify right side
    57,270.40x = 1,350,212,677.44
  5. Step 5: Solve for x
    x = 1,350,212,677.44/57,270.40
  6. Step 6: Final answer
    x = 23,576.10

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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.