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Finding the Fourth Proportional to 205,372.56, 307,927.02 and 85,512.54

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Solution

The fourth proportional to 205,372.56, 307,927.02 and 85,512.54 is: 128,213.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,372.56 : 307,927.02 = 85,512.54 : x
  2. Step 2: Convert to fraction form
    205,372.56/307,927.02 = 85,512.54/x
  3. Step 3: Cross multiply
    205,372.56x = 307,927.02 × 85,512.54
  4. Step 4: Simplify right side
    205,372.56x = 26,331,621,614.83
  5. Step 5: Solve for x
    x = 26,331,621,614.83/205,372.56
  6. Step 6: Final answer
    x = 128,213.92

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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.