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Finding the Fourth Proportional to 68,768.70, 103,153.94 and 22,021.56

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Solution

The fourth proportional to 68,768.70, 103,153.94 and 22,021.56 is: 33,032.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,768.70 : 103,153.94 = 22,021.56 : x
  2. Step 2: Convert to fraction form
    68,768.70/103,153.94 = 22,021.56/x
  3. Step 3: Cross multiply
    68,768.70x = 103,153.94 × 22,021.56
  4. Step 4: Simplify right side
    68,768.70x = 2,271,610,678.95
  5. Step 5: Solve for x
    x = 2,271,610,678.95/68,768.70
  6. Step 6: Final answer
    x = 33,032.63

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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.