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Finding the Fourth Proportional to 217,163.91, 299,694.45 and 121,667.34

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Solution

The fourth proportional to 217,163.91, 299,694.45 and 121,667.34 is: 167,905.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,163.91 : 299,694.45 = 121,667.34 : x
  2. Step 2: Convert to fraction form
    217,163.91/299,694.45 = 121,667.34/x
  3. Step 3: Cross multiply
    217,163.91x = 299,694.45 × 121,667.34
  4. Step 4: Simplify right side
    217,163.91x = 36,463,026,544.26
  5. Step 5: Solve for x
    x = 36,463,026,544.26/217,163.91
  6. Step 6: Final answer
    x = 167,905.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.