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Finding the Fourth Proportional to 85,970.15, 128,963.42 and 33,383.73

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Solution

The fourth proportional to 85,970.15, 128,963.42 and 33,383.73 is: 50,078.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,970.15 : 128,963.42 = 33,383.73 : x
  2. Step 2: Convert to fraction form
    85,970.15/128,963.42 = 33,383.73/x
  3. Step 3: Cross multiply
    85,970.15x = 128,963.42 × 33,383.73
  4. Step 4: Simplify right side
    85,970.15x = 4,305,279,993.16
  5. Step 5: Solve for x
    x = 4,305,279,993.16/85,970.15
  6. Step 6: Final answer
    x = 50,078.78

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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.