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Finding the Fourth Proportional to 215,541.72, 323,185.68 and 82,431.72

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Solution

The fourth proportional to 215,541.72, 323,185.68 and 82,431.72 is: 123,599.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,541.72 : 323,185.68 = 82,431.72 : x
  2. Step 2: Convert to fraction form
    215,541.72/323,185.68 = 82,431.72/x
  3. Step 3: Cross multiply
    215,541.72x = 323,185.68 × 82,431.72
  4. Step 4: Simplify right side
    215,541.72x = 26,640,751,481.77
  5. Step 5: Solve for x
    x = 26,640,751,481.77/215,541.72
  6. Step 6: Final answer
    x = 123,599.05

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1.5x scale

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.