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Finding the Fourth Proportional to 217,047.20, 325,570.80 and 67,286.30

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Solution

The fourth proportional to 217,047.20, 325,570.80 and 67,286.30 is: 100,929.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,047.20 : 325,570.80 = 67,286.30 : x
  2. Step 2: Convert to fraction form
    217,047.20/325,570.80 = 67,286.30/x
  3. Step 3: Cross multiply
    217,047.20x = 325,570.80 × 67,286.30
  4. Step 4: Simplify right side
    217,047.20x = 21,906,454,520.04
  5. Step 5: Solve for x
    x = 21,906,454,520.04/217,047.20
  6. Step 6: Final answer
    x = 100,929.45

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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.