Home / 209,743.20-313,958.70-165,128.40

Finding the Fourth Proportional to 209,743.20, 313,958.70 and 165,128.40

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Solution

The fourth proportional to 209,743.20, 313,958.70 and 165,128.40 is: 247,176.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,743.20 : 313,958.70 = 165,128.40 : x
  2. Step 2: Convert to fraction form
    209,743.20/313,958.70 = 165,128.40/x
  3. Step 3: Cross multiply
    209,743.20x = 313,958.70 × 165,128.40
  4. Step 4: Simplify right side
    209,743.20x = 51,843,497,797.08
  5. Step 5: Solve for x
    x = 51,843,497,797.08/209,743.20
  6. Step 6: Final answer
    x = 247,176.06

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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.