Home / 212,357.43-318,314.03-79,179.75

Finding the Fourth Proportional to 212,357.43, 318,314.03 and 79,179.75

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Solution

The fourth proportional to 212,357.43, 318,314.03 and 79,179.75 is: 118,686.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,357.43 : 318,314.03 = 79,179.75 : x
  2. Step 2: Convert to fraction form
    212,357.43/318,314.03 = 79,179.75/x
  3. Step 3: Cross multiply
    212,357.43x = 318,314.03 × 79,179.75
  4. Step 4: Simplify right side
    212,357.43x = 25,204,024,920.99
  5. Step 5: Solve for x
    x = 25,204,024,920.99/212,357.43
  6. Step 6: Final answer
    x = 118,686.81

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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.