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Finding the Fourth Proportional to 203,903.71, 305,858.64 and 70,788.20

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Solution

The fourth proportional to 203,903.71, 305,858.64 and 70,788.20 is: 106,183.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,903.71 : 305,858.64 = 70,788.20 : x
  2. Step 2: Convert to fraction form
    203,903.71/305,858.64 = 70,788.20/x
  3. Step 3: Cross multiply
    203,903.71x = 305,858.64 × 70,788.20
  4. Step 4: Simplify right side
    203,903.71x = 21,651,180,873.78
  5. Step 5: Solve for x
    x = 21,651,180,873.78/203,903.71
  6. Step 6: Final answer
    x = 106,183.36

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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.