Home / 71.10-105.90-70.77

Finding the Fourth Proportional to 71.10, 105.90 and 70.77

Calculator

Solution

The fourth proportional to 71.10, 105.90 and 70.77 is: 105.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.10 : 105.90 = 70.77 : x
  2. Step 2: Convert to fraction form
    71.10/105.90 = 70.77/x
  3. Step 3: Cross multiply
    71.10x = 105.90 × 70.77
  4. Step 4: Simplify right side
    71.10x = 7,494.54
  5. Step 5: Solve for x
    x = 7,494.54/71.10
  6. Step 6: Final answer
    x = 105.41

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.