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Finding the Fourth Proportional to 260,012.20, 389,903.10 and 119,813.80

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Solution

The fourth proportional to 260,012.20, 389,903.10 and 119,813.80 is: 179,667.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,012.20 : 389,903.10 = 119,813.80 : x
  2. Step 2: Convert to fraction form
    260,012.20/389,903.10 = 119,813.80/x
  3. Step 3: Cross multiply
    260,012.20x = 389,903.10 × 119,813.80
  4. Step 4: Simplify right side
    260,012.20x = 46,715,772,042.78
  5. Step 5: Solve for x
    x = 46,715,772,042.78/260,012.20
  6. Step 6: Final answer
    x = 179,667.62

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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.