Home / 105.39-145.32-79.08

Finding the Fourth Proportional to 105.39, 145.32 and 79.08

Calculator

Solution

The fourth proportional to 105.39, 145.32 and 79.08 is: 109.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.39 : 145.32 = 79.08 : x
  2. Step 2: Convert to fraction form
    105.39/145.32 = 79.08/x
  3. Step 3: Cross multiply
    105.39x = 145.32 × 79.08
  4. Step 4: Simplify right side
    105.39x = 11,491.91
  5. Step 5: Solve for x
    x = 11,491.91/105.39
  6. Step 6: Final answer
    x = 109.04

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.