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Finding the Fourth Proportional to 206,340.64, 309,555.52 and 64,183.21

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Solution

The fourth proportional to 206,340.64, 309,555.52 and 64,183.21 is: 96,288.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,340.64 : 309,555.52 = 64,183.21 : x
  2. Step 2: Convert to fraction form
    206,340.64/309,555.52 = 64,183.21/x
  3. Step 3: Cross multiply
    206,340.64x = 309,555.52 × 64,183.21
  4. Step 4: Simplify right side
    206,340.64x = 19,868,266,012.47
  5. Step 5: Solve for x
    x = 19,868,266,012.47/206,340.64
  6. Step 6: Final answer
    x = 96,288.67

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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.