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Finding the Fourth Proportional to 216,288.57, 324,469.71 and 66,525.57

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Solution

The fourth proportional to 216,288.57, 324,469.71 and 66,525.57 is: 99,799.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,288.57 : 324,469.71 = 66,525.57 : x
  2. Step 2: Convert to fraction form
    216,288.57/324,469.71 = 66,525.57/x
  3. Step 3: Cross multiply
    216,288.57x = 324,469.71 × 66,525.57
  4. Step 4: Simplify right side
    216,288.57x = 21,585,532,405.48
  5. Step 5: Solve for x
    x = 21,585,532,405.48/216,288.57
  6. Step 6: Final answer
    x = 99,799.69

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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.