Home / 68-102-25.25

Finding the Fourth Proportional to 68, 102 and 25.25

Calculator

Solution

The fourth proportional to 68, 102 and 25.25 is: 37.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    68 : 102 = 25.25 : x
  2. Step 2: Convert to fraction form
    68/102 = 25.25/x
  3. Step 3: Cross multiply
    68x = 102 × 25.25
  4. Step 4: Simplify right side
    68x = 2,575.50
  5. Step 5: Solve for x
    x = 2,575.50/68
  6. Step 6: Final answer
    x = 37.88

Related Problems

Find fourth proportional to 34, 51 and 12.63
Half scale
Find fourth proportional to 136, 204 and 50.50
Double scale
Find fourth proportional to 69, 103.50 and 26.25
Similar ratio
Find fourth proportional to 102, 153 and 37.88
1.5x scale

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.