Home / 213,911.93-320,910.75-78,976.85

Finding the Fourth Proportional to 213,911.93, 320,910.75 and 78,976.85

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Solution

The fourth proportional to 213,911.93, 320,910.75 and 78,976.85 is: 118,481.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,911.93 : 320,910.75 = 78,976.85 : x
  2. Step 2: Convert to fraction form
    213,911.93/320,910.75 = 78,976.85/x
  3. Step 3: Cross multiply
    213,911.93x = 320,910.75 × 78,976.85
  4. Step 4: Simplify right side
    213,911.93x = 25,344,518,561.58
  5. Step 5: Solve for x
    x = 25,344,518,561.58/213,911.93
  6. Step 6: Final answer
    x = 118,481.09

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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.