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Finding the Fourth Proportional to 80,369.44, 120,559.16 and 21,205.17

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Solution

The fourth proportional to 80,369.44, 120,559.16 and 21,205.17 is: 31,809.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,369.44 : 120,559.16 = 21,205.17 : x
  2. Step 2: Convert to fraction form
    80,369.44/120,559.16 = 21,205.17/x
  3. Step 3: Cross multiply
    80,369.44x = 120,559.16 × 21,205.17
  4. Step 4: Simplify right side
    80,369.44x = 2,556,477,535.87
  5. Step 5: Solve for x
    x = 2,556,477,535.87/80,369.44
  6. Step 6: Final answer
    x = 31,809.08

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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.