Home / 216,400-324,614.72-66,631.04

Finding the Fourth Proportional to 216,400, 324,614.72 and 66,631.04

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Solution

The fourth proportional to 216,400, 324,614.72 and 66,631.04 is: 99,951.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,400 : 324,614.72 = 66,631.04 : x
  2. Step 2: Convert to fraction form
    216,400/324,614.72 = 66,631.04/x
  3. Step 3: Cross multiply
    216,400x = 324,614.72 × 66,631.04
  4. Step 4: Simplify right side
    216,400x = 21,629,416,392.91
  5. Step 5: Solve for x
    x = 21,629,416,392.91/216,400
  6. Step 6: Final answer
    x = 99,951.09

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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.