Home / 215,933.16-323,946.15-66,183.78

Finding the Fourth Proportional to 215,933.16, 323,946.15 and 66,183.78

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Solution

The fourth proportional to 215,933.16, 323,946.15 and 66,183.78 is: 99,289.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,933.16 : 323,946.15 = 66,183.78 : x
  2. Step 2: Convert to fraction form
    215,933.16/323,946.15 = 66,183.78/x
  3. Step 3: Cross multiply
    215,933.16x = 323,946.15 × 66,183.78
  4. Step 4: Simplify right side
    215,933.16x = 21,439,980,723.45
  5. Step 5: Solve for x
    x = 21,439,980,723.45/215,933.16
  6. Step 6: Final answer
    x = 99,289.89

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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.