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Finding the Fourth Proportional to 212,230.78, 317,813.81 and 126,788.94

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Solution

The fourth proportional to 212,230.78, 317,813.81 and 126,788.94 is: 189,865.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,230.78 : 317,813.81 = 126,788.94 : x
  2. Step 2: Convert to fraction form
    212,230.78/317,813.81 = 126,788.94/x
  3. Step 3: Cross multiply
    212,230.78x = 317,813.81 × 126,788.94
  4. Step 4: Simplify right side
    212,230.78x = 40,295,275,453.32
  5. Step 5: Solve for x
    x = 40,295,275,453.32/212,230.78
  6. Step 6: Final answer
    x = 189,865.37

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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.