Home / 54,144.86-81,231.12-20,855.98

Finding the Fourth Proportional to 54,144.86, 81,231.12 and 20,855.98

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Solution

The fourth proportional to 54,144.86, 81,231.12 and 20,855.98 is: 31,289.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,144.86 : 81,231.12 = 20,855.98 : x
  2. Step 2: Convert to fraction form
    54,144.86/81,231.12 = 20,855.98/x
  3. Step 3: Cross multiply
    54,144.86x = 81,231.12 × 20,855.98
  4. Step 4: Simplify right side
    54,144.86x = 1,694,154,715.64
  5. Step 5: Solve for x
    x = 1,694,154,715.64/54,144.86
  6. Step 6: Final answer
    x = 31,289.30

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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.