Home / 212.70-318.96-75.72

Finding the Fourth Proportional to 212.70, 318.96 and 75.72

Calculator

Solution

The fourth proportional to 212.70, 318.96 and 75.72 is: 113.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.70 : 318.96 = 75.72 : x
  2. Step 2: Convert to fraction form
    212.70/318.96 = 75.72/x
  3. Step 3: Cross multiply
    212.70x = 318.96 × 75.72
  4. Step 4: Simplify right side
    212.70x = 24,151.65
  5. Step 5: Solve for x
    x = 24,151.65/212.70
  6. Step 6: Final answer
    x = 113.55

Related Problems

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.