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Finding the Fourth Proportional to 218,232.57, 327,428.81 and 91,904.61

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Solution

The fourth proportional to 218,232.57, 327,428.81 and 91,904.61 is: 137,890.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,232.57 : 327,428.81 = 91,904.61 : x
  2. Step 2: Convert to fraction form
    218,232.57/327,428.81 = 91,904.61/x
  3. Step 3: Cross multiply
    218,232.57x = 327,428.81 × 91,904.61
  4. Step 4: Simplify right side
    218,232.57x = 30,092,218,715.75
  5. Step 5: Solve for x
    x = 30,092,218,715.75/218,232.57
  6. Step 6: Final answer
    x = 137,890.60

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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.