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Finding the Fourth Proportional to 85,986.39, 128,902.64 and 33,383.37

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Solution

The fourth proportional to 85,986.39, 128,902.64 and 33,383.37 is: 50,045.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,986.39 : 128,902.64 = 33,383.37 : x
  2. Step 2: Convert to fraction form
    85,986.39/128,902.64 = 33,383.37/x
  3. Step 3: Cross multiply
    85,986.39x = 128,902.64 × 33,383.37
  4. Step 4: Simplify right side
    85,986.39x = 4,303,204,358.18
  5. Step 5: Solve for x
    x = 4,303,204,358.18/85,986.39
  6. Step 6: Final answer
    x = 50,045.18

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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.