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Finding the Fourth Proportional to 216,520.80, 324,723.60 and 66,760.80

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Solution

The fourth proportional to 216,520.80, 324,723.60 and 66,760.80 is: 100,123.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,520.80 : 324,723.60 = 66,760.80 : x
  2. Step 2: Convert to fraction form
    216,520.80/324,723.60 = 66,760.80/x
  3. Step 3: Cross multiply
    216,520.80x = 324,723.60 × 66,760.80
  4. Step 4: Simplify right side
    216,520.80x = 21,678,807,314.88
  5. Step 5: Solve for x
    x = 21,678,807,314.88/216,520.80
  6. Step 6: Final answer
    x = 100,123.44

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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.