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Finding the Fourth Proportional to 192,990.26, 289,486.08 and 136,660

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Solution

The fourth proportional to 192,990.26, 289,486.08 and 136,660 is: 204,990.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,990.26 : 289,486.08 = 136,660 : x
  2. Step 2: Convert to fraction form
    192,990.26/289,486.08 = 136,660/x
  3. Step 3: Cross multiply
    192,990.26x = 289,486.08 × 136,660
  4. Step 4: Simplify right side
    192,990.26x = 39,561,167,692.80
  5. Step 5: Solve for x
    x = 39,561,167,692.80/192,990.26
  6. Step 6: Final answer
    x = 204,990.49

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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.