Home / 73,021.21-109,532.04-20,431.15

Finding the Fourth Proportional to 73,021.21, 109,532.04 and 20,431.15

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Solution

The fourth proportional to 73,021.21, 109,532.04 and 20,431.15 is: 30,646.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,021.21 : 109,532.04 = 20,431.15 : x
  2. Step 2: Convert to fraction form
    73,021.21/109,532.04 = 20,431.15/x
  3. Step 3: Cross multiply
    73,021.21x = 109,532.04 × 20,431.15
  4. Step 4: Simplify right side
    73,021.21x = 2,237,865,539.05
  5. Step 5: Solve for x
    x = 2,237,865,539.05/73,021.21
  6. Step 6: Final answer
    x = 30,646.79

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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.