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Finding the Fourth Proportional to 217,641.84, 300,375.12 and 122,153.82

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Solution

The fourth proportional to 217,641.84, 300,375.12 and 122,153.82 is: 168,588.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,641.84 : 300,375.12 = 122,153.82 : x
  2. Step 2: Convert to fraction form
    217,641.84/300,375.12 = 122,153.82/x
  3. Step 3: Cross multiply
    217,641.84x = 300,375.12 × 122,153.82
  4. Step 4: Simplify right side
    217,641.84x = 36,691,968,340.96
  5. Step 5: Solve for x
    x = 36,691,968,340.96/217,641.84
  6. Step 6: Final answer
    x = 168,588.76

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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.