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Finding the Fourth Proportional to 217,507.15, 326,379.65 and 84,392.66

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Solution

The fourth proportional to 217,507.15, 326,379.65 and 84,392.66 is: 126,635.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,507.15 : 326,379.65 = 84,392.66 : x
  2. Step 2: Convert to fraction form
    217,507.15/326,379.65 = 84,392.66/x
  3. Step 3: Cross multiply
    217,507.15x = 326,379.65 × 84,392.66
  4. Step 4: Simplify right side
    217,507.15x = 27,544,047,227.35
  5. Step 5: Solve for x
    x = 27,544,047,227.35/217,507.15
  6. Step 6: Final answer
    x = 126,635.13

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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.