Home / 195.38-292.48-126.78

Finding the Fourth Proportional to 195.38, 292.48 and 126.78

Calculator

Solution

The fourth proportional to 195.38, 292.48 and 126.78 is: 189.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.38 : 292.48 = 126.78 : x
  2. Step 2: Convert to fraction form
    195.38/292.48 = 126.78/x
  3. Step 3: Cross multiply
    195.38x = 292.48 × 126.78
  4. Step 4: Simplify right side
    195.38x = 37,080.61
  5. Step 5: Solve for x
    x = 37,080.61/195.38
  6. Step 6: Final answer
    x = 189.79

Related Problems

Find fourth proportional to 97.69, 146.24 and 63.39
Half scale
Find fourth proportional to 390.76, 584.96 and 253.56
Double scale
Find fourth proportional to 196.38, 293.98 and 127.78
Similar ratio
Find fourth proportional to 293.07, 438.72 and 190.17
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.