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Finding the Fourth Proportional to 218,123.92, 327,186.40 and 66,322.40

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Solution

The fourth proportional to 218,123.92, 327,186.40 and 66,322.40 is: 99,483.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,123.92 : 327,186.40 = 66,322.40 : x
  2. Step 2: Convert to fraction form
    218,123.92/327,186.40 = 66,322.40/x
  3. Step 3: Cross multiply
    218,123.92x = 327,186.40 × 66,322.40
  4. Step 4: Simplify right side
    218,123.92x = 21,699,787,295.36
  5. Step 5: Solve for x
    x = 21,699,787,295.36/218,123.92
  6. Step 6: Final answer
    x = 99,483.76

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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.