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Finding the Fourth Proportional to 216,506.89, 324,790.40 and 66,758.95

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Solution

The fourth proportional to 216,506.89, 324,790.40 and 66,758.95 is: 100,147.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,506.89 : 324,790.40 = 66,758.95 : x
  2. Step 2: Convert to fraction form
    216,506.89/324,790.40 = 66,758.95/x
  3. Step 3: Cross multiply
    216,506.89x = 324,790.40 × 66,758.95
  4. Step 4: Simplify right side
    216,506.89x = 21,682,665,429.00
  5. Step 5: Solve for x
    x = 21,682,665,429.00/216,506.89
  6. Step 6: Final answer
    x = 100,147.69

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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.