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Finding the Fourth Proportional to 80,019.93, 120,029.99 and 20,855.55

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Solution

The fourth proportional to 80,019.93, 120,029.99 and 20,855.55 is: 31,283.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,019.93 : 120,029.99 = 20,855.55 : x
  2. Step 2: Convert to fraction form
    80,019.93/120,029.99 = 20,855.55/x
  3. Step 3: Cross multiply
    80,019.93x = 120,029.99 × 20,855.55
  4. Step 4: Simplify right side
    80,019.93x = 2,503,291,353.67
  5. Step 5: Solve for x
    x = 2,503,291,353.67/80,019.93
  6. Step 6: Final answer
    x = 31,283.35

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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.