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Finding the Fourth Proportional to 85,512.44, 128,269 and 50,427.50

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Solution

The fourth proportional to 85,512.44, 128,269 and 50,427.50 is: 75,641.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,512.44 : 128,269 = 50,427.50 : x
  2. Step 2: Convert to fraction form
    85,512.44/128,269 = 50,427.50/x
  3. Step 3: Cross multiply
    85,512.44x = 128,269 × 50,427.50
  4. Step 4: Simplify right side
    85,512.44x = 6,468,284,997.50
  5. Step 5: Solve for x
    x = 6,468,284,997.50/85,512.44
  6. Step 6: Final answer
    x = 75,641.45

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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.