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Finding the Fourth Proportional to 215,732.16, 323,568 and 91,044

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Solution

The fourth proportional to 215,732.16, 323,568 and 91,044 is: 136,553.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,732.16 : 323,568 = 91,044 : x
  2. Step 2: Convert to fraction form
    215,732.16/323,568 = 91,044/x
  3. Step 3: Cross multiply
    215,732.16x = 323,568 × 91,044
  4. Step 4: Simplify right side
    215,732.16x = 29,458,924,992
  5. Step 5: Solve for x
    x = 29,458,924,992/215,732.16
  6. Step 6: Final answer
    x = 136,553.24

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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.