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Finding the Fourth Proportional to 215,827.30, 323,712.60 and 66,082.60

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Solution

The fourth proportional to 215,827.30, 323,712.60 and 66,082.60 is: 99,115.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,827.30 : 323,712.60 = 66,082.60 : x
  2. Step 2: Convert to fraction form
    215,827.30/323,712.60 = 66,082.60/x
  3. Step 3: Cross multiply
    215,827.30x = 323,712.60 × 66,082.60
  4. Step 4: Simplify right side
    215,827.30x = 21,391,770,260.76
  5. Step 5: Solve for x
    x = 21,391,770,260.76/215,827.30
  6. Step 6: Final answer
    x = 99,115.22

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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.