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Finding the Fourth Proportional to 68,364.72, 102,550.11 and 20,976.34

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Solution

The fourth proportional to 68,364.72, 102,550.11 and 20,976.34 is: 31,465.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,364.72 : 102,550.11 = 20,976.34 : x
  2. Step 2: Convert to fraction form
    68,364.72/102,550.11 = 20,976.34/x
  3. Step 3: Cross multiply
    68,364.72x = 102,550.11 × 20,976.34
  4. Step 4: Simplify right side
    68,364.72x = 2,151,125,974.40
  5. Step 5: Solve for x
    x = 2,151,125,974.40/68,364.72
  6. Step 6: Final answer
    x = 31,465.44

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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.