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Finding the Fourth Proportional to 217,507.17, 326,379.67 and 84,392.68

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Solution

The fourth proportional to 217,507.17, 326,379.67 and 84,392.68 is: 126,635.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,507.17 : 326,379.67 = 84,392.68 : x
  2. Step 2: Convert to fraction form
    217,507.17/326,379.67 = 84,392.68/x
  3. Step 3: Cross multiply
    217,507.17x = 326,379.67 × 84,392.68
  4. Step 4: Simplify right side
    217,507.17x = 27,544,055,048.82
  5. Step 5: Solve for x
    x = 27,544,055,048.82/217,507.17
  6. Step 6: Final answer
    x = 126,635.16

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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.