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Finding the Fourth Proportional to 149,140.91, 205,814.49 and 82,072.91

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Solution

The fourth proportional to 149,140.91, 205,814.49 and 82,072.91 is: 113,260.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,140.91 : 205,814.49 = 82,072.91 : x
  2. Step 2: Convert to fraction form
    149,140.91/205,814.49 = 82,072.91/x
  3. Step 3: Cross multiply
    149,140.91x = 205,814.49 × 82,072.91
  4. Step 4: Simplify right side
    149,140.91x = 16,891,792,675.03
  5. Step 5: Solve for x
    x = 16,891,792,675.03/149,140.91
  6. Step 6: Final answer
    x = 113,260.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.