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Finding the Fourth Proportional to 85,753.44, 128,827.80 and 82,210.56

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Solution

The fourth proportional to 85,753.44, 128,827.80 and 82,210.56 is: 123,505.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,753.44 : 128,827.80 = 82,210.56 : x
  2. Step 2: Convert to fraction form
    85,753.44/128,827.80 = 82,210.56/x
  3. Step 3: Cross multiply
    85,753.44x = 128,827.80 × 82,210.56
  4. Step 4: Simplify right side
    85,753.44x = 10,591,005,581.57
  5. Step 5: Solve for x
    x = 10,591,005,581.57/85,753.44
  6. Step 6: Final answer
    x = 123,505.31

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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.