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Finding the Fourth Proportional to 217,171.20, 325,519.20 and 76,857.60

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Solution

The fourth proportional to 217,171.20, 325,519.20 and 76,857.60 is: 115,202.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,171.20 : 325,519.20 = 76,857.60 : x
  2. Step 2: Convert to fraction form
    217,171.20/325,519.20 = 76,857.60/x
  3. Step 3: Cross multiply
    217,171.20x = 325,519.20 × 76,857.60
  4. Step 4: Simplify right side
    217,171.20x = 25,018,624,465.92
  5. Step 5: Solve for x
    x = 25,018,624,465.92/217,171.20
  6. Step 6: Final answer
    x = 115,202.31

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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.