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Finding the Fourth Proportional to 85,003.10, 127,516.80 and 28,845.80

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Solution

The fourth proportional to 85,003.10, 127,516.80 and 28,845.80 is: 43,272.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,003.10 : 127,516.80 = 28,845.80 : x
  2. Step 2: Convert to fraction form
    85,003.10/127,516.80 = 28,845.80/x
  3. Step 3: Cross multiply
    85,003.10x = 127,516.80 × 28,845.80
  4. Step 4: Simplify right side
    85,003.10x = 3,678,324,109.44
  5. Step 5: Solve for x
    x = 3,678,324,109.44/85,003.10
  6. Step 6: Final answer
    x = 43,272.82

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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.