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Finding the Fourth Proportional to 216,711.82, 324,986.90 and 74,516.87

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Solution

The fourth proportional to 216,711.82, 324,986.90 and 74,516.87 is: 111,747.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,711.82 : 324,986.90 = 74,516.87 : x
  2. Step 2: Convert to fraction form
    216,711.82/324,986.90 = 74,516.87/x
  3. Step 3: Cross multiply
    216,711.82x = 324,986.90 × 74,516.87
  4. Step 4: Simplify right side
    216,711.82x = 24,217,007,018.89
  5. Step 5: Solve for x
    x = 24,217,007,018.89/216,711.82
  6. Step 6: Final answer
    x = 111,747.51

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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.