Home / 212,286.21-318,418.91-79,156.06

Finding the Fourth Proportional to 212,286.21, 318,418.91 and 79,156.06

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Solution

The fourth proportional to 212,286.21, 318,418.91 and 79,156.06 is: 118,730.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,286.21 : 318,418.91 = 79,156.06 : x
  2. Step 2: Convert to fraction form
    212,286.21/318,418.91 = 79,156.06/x
  3. Step 3: Cross multiply
    212,286.21x = 318,418.91 × 79,156.06
  4. Step 4: Simplify right side
    212,286.21x = 25,204,786,941.01
  5. Step 5: Solve for x
    x = 25,204,786,941.01/212,286.21
  6. Step 6: Final answer
    x = 118,730.21

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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.