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Finding the Fourth Proportional to 215,812.89, 323,719.34 and 91,154.97

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Solution

The fourth proportional to 215,812.89, 323,719.34 and 91,154.97 is: 136,732.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,812.89 : 323,719.34 = 91,154.97 : x
  2. Step 2: Convert to fraction form
    215,812.89/323,719.34 = 91,154.97/x
  3. Step 3: Cross multiply
    215,812.89x = 323,719.34 × 91,154.97
  4. Step 4: Simplify right side
    215,812.89x = 29,508,626,270.35
  5. Step 5: Solve for x
    x = 29,508,626,270.35/215,812.89
  6. Step 6: Final answer
    x = 136,732.46

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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.