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Finding the Fourth Proportional to 216,310.11, 324,470.41 and 66,551.64

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Solution

The fourth proportional to 216,310.11, 324,470.41 and 66,551.64 is: 99,829.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,310.11 : 324,470.41 = 66,551.64 : x
  2. Step 2: Convert to fraction form
    216,310.11/324,470.41 = 66,551.64/x
  3. Step 3: Cross multiply
    216,310.11x = 324,470.41 × 66,551.64
  4. Step 4: Simplify right side
    216,310.11x = 21,594,038,358.98
  5. Step 5: Solve for x
    x = 21,594,038,358.98/216,310.11
  6. Step 6: Final answer
    x = 99,829.07

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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.