Home / 209,226.80-313,840.20-129,328.40

Finding the Fourth Proportional to 209,226.80, 313,840.20 and 129,328.40

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Solution

The fourth proportional to 209,226.80, 313,840.20 and 129,328.40 is: 193,992.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,226.80 : 313,840.20 = 129,328.40 : x
  2. Step 2: Convert to fraction form
    209,226.80/313,840.20 = 129,328.40/x
  3. Step 3: Cross multiply
    209,226.80x = 313,840.20 × 129,328.40
  4. Step 4: Simplify right side
    209,226.80x = 40,588,450,921.68
  5. Step 5: Solve for x
    x = 40,588,450,921.68/209,226.80
  6. Step 6: Final answer
    x = 193,992.60

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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.