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Finding the Fourth Proportional to 215,886.08, 323,850.72 and 66,124.64

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Solution

The fourth proportional to 215,886.08, 323,850.72 and 66,124.64 is: 99,193.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,886.08 : 323,850.72 = 66,124.64 : x
  2. Step 2: Convert to fraction form
    215,886.08/323,850.72 = 66,124.64/x
  3. Step 3: Cross multiply
    215,886.08x = 323,850.72 × 66,124.64
  4. Step 4: Simplify right side
    215,886.08x = 21,414,511,744.94
  5. Step 5: Solve for x
    x = 21,414,511,744.94/215,886.08
  6. Step 6: Final answer
    x = 99,193.57

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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.