Home / 209,109.12-313,449.92-90,680.64

Finding the Fourth Proportional to 209,109.12, 313,449.92 and 90,680.64

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Solution

The fourth proportional to 209,109.12, 313,449.92 and 90,680.64 is: 135,928.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,109.12 : 313,449.92 = 90,680.64 : x
  2. Step 2: Convert to fraction form
    209,109.12/313,449.92 = 90,680.64/x
  3. Step 3: Cross multiply
    209,109.12x = 313,449.92 × 90,680.64
  4. Step 4: Simplify right side
    209,109.12x = 28,423,839,353.55
  5. Step 5: Solve for x
    x = 28,423,839,353.55/209,109.12
  6. Step 6: Final answer
    x = 135,928.26

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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.