Home / 105.42-145.39-68.55

Finding the Fourth Proportional to 105.42, 145.39 and 68.55

Calculator

Solution

The fourth proportional to 105.42, 145.39 and 68.55 is: 94.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.42 : 145.39 = 68.55 : x
  2. Step 2: Convert to fraction form
    105.42/145.39 = 68.55/x
  3. Step 3: Cross multiply
    105.42x = 145.39 × 68.55
  4. Step 4: Simplify right side
    105.42x = 9,966.48
  5. Step 5: Solve for x
    x = 9,966.48/105.42
  6. Step 6: Final answer
    x = 94.54

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.