Home / 120.70-181.07-52.21

Finding the Fourth Proportional to 120.70, 181.07 and 52.21

Calculator

Solution

The fourth proportional to 120.70, 181.07 and 52.21 is: 78.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.70 : 181.07 = 52.21 : x
  2. Step 2: Convert to fraction form
    120.70/181.07 = 52.21/x
  3. Step 3: Cross multiply
    120.70x = 181.07 × 52.21
  4. Step 4: Simplify right side
    120.70x = 9,453.28
  5. Step 5: Solve for x
    x = 9,453.28/120.70
  6. Step 6: Final answer
    x = 78.32

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.