Home / 80,019.50-120,036.11-20,855.07

Finding the Fourth Proportional to 80,019.50, 120,036.11 and 20,855.07

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Solution

The fourth proportional to 80,019.50, 120,036.11 and 20,855.07 is: 31,284.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,019.50 : 120,036.11 = 20,855.07 : x
  2. Step 2: Convert to fraction form
    80,019.50/120,036.11 = 20,855.07/x
  3. Step 3: Cross multiply
    80,019.50x = 120,036.11 × 20,855.07
  4. Step 4: Simplify right side
    80,019.50x = 2,503,361,372.30
  5. Step 5: Solve for x
    x = 2,503,361,372.30/80,019.50
  6. Step 6: Final answer
    x = 31,284.39

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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.