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Finding the Fourth Proportional to 216,100.08, 324,138.39 and 66,340.39

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Solution

The fourth proportional to 216,100.08, 324,138.39 and 66,340.39 is: 99,506.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,100.08 : 324,138.39 = 66,340.39 : x
  2. Step 2: Convert to fraction form
    216,100.08/324,138.39 = 66,340.39/x
  3. Step 3: Cross multiply
    216,100.08x = 324,138.39 × 66,340.39
  4. Step 4: Simplify right side
    216,100.08x = 21,503,467,206.57
  5. Step 5: Solve for x
    x = 21,503,467,206.57/216,100.08
  6. Step 6: Final answer
    x = 99,506.98

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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.