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Finding the Fourth Proportional to 259,969.80, 389,954.70 and 82,490.70

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Solution

The fourth proportional to 259,969.80, 389,954.70 and 82,490.70 is: 123,736.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,969.80 : 389,954.70 = 82,490.70 : x
  2. Step 2: Convert to fraction form
    259,969.80/389,954.70 = 82,490.70/x
  3. Step 3: Cross multiply
    259,969.80x = 389,954.70 × 82,490.70
  4. Step 4: Simplify right side
    259,969.80x = 32,167,636,171.29
  5. Step 5: Solve for x
    x = 32,167,636,171.29/259,969.80
  6. Step 6: Final answer
    x = 123,736.05

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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.