Home / 209,121.22-313,505.50-90,703.40

Finding the Fourth Proportional to 209,121.22, 313,505.50 and 90,703.40

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Solution

The fourth proportional to 209,121.22, 313,505.50 and 90,703.40 is: 135,978.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,121.22 : 313,505.50 = 90,703.40 : x
  2. Step 2: Convert to fraction form
    209,121.22/313,505.50 = 90,703.40/x
  3. Step 3: Cross multiply
    209,121.22x = 313,505.50 × 90,703.40
  4. Step 4: Simplify right side
    209,121.22x = 28,436,014,768.70
  5. Step 5: Solve for x
    x = 28,436,014,768.70/209,121.22
  6. Step 6: Final answer
    x = 135,978.62

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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.