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Finding the Fourth Proportional to 216,535.11, 324,787.10 and 66,759.78

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Solution

The fourth proportional to 216,535.11, 324,787.10 and 66,759.78 is: 100,134.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,535.11 : 324,787.10 = 66,759.78 : x
  2. Step 2: Convert to fraction form
    216,535.11/324,787.10 = 66,759.78/x
  3. Step 3: Cross multiply
    216,535.11x = 324,787.10 × 66,759.78
  4. Step 4: Simplify right side
    216,535.11x = 21,682,715,009.04
  5. Step 5: Solve for x
    x = 21,682,715,009.04/216,535.11
  6. Step 6: Final answer
    x = 100,134.87

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1.5x scale

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.