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Finding the Fourth Proportional to 85,969.15, 128,961.92 and 33,382.73

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Solution

The fourth proportional to 85,969.15, 128,961.92 and 33,382.73 is: 50,077.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,969.15 : 128,961.92 = 33,382.73 : x
  2. Step 2: Convert to fraction form
    85,969.15/128,961.92 = 33,382.73/x
  3. Step 3: Cross multiply
    85,969.15x = 128,961.92 × 33,382.73
  4. Step 4: Simplify right side
    85,969.15x = 4,305,101,361.50
  5. Step 5: Solve for x
    x = 4,305,101,361.50/85,969.15
  6. Step 6: Final answer
    x = 50,077.28

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1.5x scale

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.