Home / 84.55-126.83-30.45

Finding the Fourth Proportional to 84.55, 126.83 and 30.45

Calculator

Solution

The fourth proportional to 84.55, 126.83 and 30.45 is: 45.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.55 : 126.83 = 30.45 : x
  2. Step 2: Convert to fraction form
    84.55/126.83 = 30.45/x
  3. Step 3: Cross multiply
    84.55x = 126.83 × 30.45
  4. Step 4: Simplify right side
    84.55x = 3,861.97
  5. Step 5: Solve for x
    x = 3,861.97/84.55
  6. Step 6: Final answer
    x = 45.68

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.