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Finding the Fourth Proportional to 89,796.82, 133,634.99 and 86,806.84

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Solution

The fourth proportional to 89,796.82, 133,634.99 and 86,806.84 is: 129,185.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,796.82 : 133,634.99 = 86,806.84 : x
  2. Step 2: Convert to fraction form
    89,796.82/133,634.99 = 86,806.84/x
  3. Step 3: Cross multiply
    89,796.82x = 133,634.99 × 86,806.84
  4. Step 4: Simplify right side
    89,796.82x = 11,600,431,195.33
  5. Step 5: Solve for x
    x = 11,600,431,195.33/89,796.82
  6. Step 6: Final answer
    x = 129,185.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.