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Finding the Fourth Proportional to 139,629.80, 209,452.80 and 39,797.30

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Solution

The fourth proportional to 139,629.80, 209,452.80 and 39,797.30 is: 59,698.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,629.80 : 209,452.80 = 39,797.30 : x
  2. Step 2: Convert to fraction form
    139,629.80/209,452.80 = 39,797.30/x
  3. Step 3: Cross multiply
    139,629.80x = 209,452.80 × 39,797.30
  4. Step 4: Simplify right side
    139,629.80x = 8,335,655,917.44
  5. Step 5: Solve for x
    x = 8,335,655,917.44/139,629.80
  6. Step 6: Final answer
    x = 59,698.26

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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.