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Finding the Fourth Proportional to 57,288.57, 85,979.02 and 39,508.26

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Solution

The fourth proportional to 57,288.57, 85,979.02 and 39,508.26 is: 59,294.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,288.57 : 85,979.02 = 39,508.26 : x
  2. Step 2: Convert to fraction form
    57,288.57/85,979.02 = 39,508.26/x
  3. Step 3: Cross multiply
    57,288.57x = 85,979.02 × 39,508.26
  4. Step 4: Simplify right side
    57,288.57x = 3,396,881,129.59
  5. Step 5: Solve for x
    x = 3,396,881,129.59/57,288.57
  6. Step 6: Final answer
    x = 59,294.22

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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.