Home / 72.92-109.26-70.28

Finding the Fourth Proportional to 72.92, 109.26 and 70.28

Calculator

Solution

The fourth proportional to 72.92, 109.26 and 70.28 is: 105.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.92 : 109.26 = 70.28 : x
  2. Step 2: Convert to fraction form
    72.92/109.26 = 70.28/x
  3. Step 3: Cross multiply
    72.92x = 109.26 × 70.28
  4. Step 4: Simplify right side
    72.92x = 7,678.79
  5. Step 5: Solve for x
    x = 7,678.79/72.92
  6. Step 6: Final answer
    x = 105.30

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.