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Finding the Fourth Proportional to 215,388, 323,134.32 and 67,644

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Solution

The fourth proportional to 215,388, 323,134.32 and 67,644 is: 101,482.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,388 : 323,134.32 = 67,644 : x
  2. Step 2: Convert to fraction form
    215,388/323,134.32 = 67,644/x
  3. Step 3: Cross multiply
    215,388x = 323,134.32 × 67,644
  4. Step 4: Simplify right side
    215,388x = 21,858,097,942.08
  5. Step 5: Solve for x
    x = 21,858,097,942.08/215,388
  6. Step 6: Final answer
    x = 101,482.43

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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.