Home / 80,619.58-120,928.98-20,647.94

Finding the Fourth Proportional to 80,619.58, 120,928.98 and 20,647.94

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Solution

The fourth proportional to 80,619.58, 120,928.98 and 20,647.94 is: 30,971.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,619.58 : 120,928.98 = 20,647.94 : x
  2. Step 2: Convert to fraction form
    80,619.58/120,928.98 = 20,647.94/x
  3. Step 3: Cross multiply
    80,619.58x = 120,928.98 × 20,647.94
  4. Step 4: Simplify right side
    80,619.58x = 2,496,934,323.30
  5. Step 5: Solve for x
    x = 2,496,934,323.30/80,619.58
  6. Step 6: Final answer
    x = 30,971.81

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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.