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Finding the Fourth Proportional to 215,691.10, 323,537.48 and 65,930.80

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Solution

The fourth proportional to 215,691.10, 323,537.48 and 65,930.80 is: 98,896.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,691.10 : 323,537.48 = 65,930.80 : x
  2. Step 2: Convert to fraction form
    215,691.10/323,537.48 = 65,930.80/x
  3. Step 3: Cross multiply
    215,691.10x = 323,537.48 × 65,930.80
  4. Step 4: Simplify right side
    215,691.10x = 21,331,085,815.03
  5. Step 5: Solve for x
    x = 21,331,085,815.03/215,691.10
  6. Step 6: Final answer
    x = 98,896.46

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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.