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Finding the Fourth Proportional to 235,321.86, 324,771.81 and 139,828.65

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Solution

The fourth proportional to 235,321.86, 324,771.81 and 139,828.65 is: 192,979.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,321.86 : 324,771.81 = 139,828.65 : x
  2. Step 2: Convert to fraction form
    235,321.86/324,771.81 = 139,828.65/x
  3. Step 3: Cross multiply
    235,321.86x = 324,771.81 × 139,828.65
  4. Step 4: Simplify right side
    235,321.86x = 45,412,403,750.36
  5. Step 5: Solve for x
    x = 45,412,403,750.36/235,321.86
  6. Step 6: Final answer
    x = 192,979.96

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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.