Home / 195-292.62-66.78

Finding the Fourth Proportional to 195, 292.62 and 66.78

Calculator

Solution

The fourth proportional to 195, 292.62 and 66.78 is: 100.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    195 : 292.62 = 66.78 : x
  2. Step 2: Convert to fraction form
    195/292.62 = 66.78/x
  3. Step 3: Cross multiply
    195x = 292.62 × 66.78
  4. Step 4: Simplify right side
    195x = 19,541.16
  5. Step 5: Solve for x
    x = 19,541.16/195
  6. Step 6: Final answer
    x = 100.21

Related Problems

Find fourth proportional to 97.50, 146.31 and 33.39
Half scale
Find fourth proportional to 390, 585.24 and 133.56
Double scale
Find fourth proportional to 196, 294.12 and 67.78
Similar ratio
Find fourth proportional to 292.50, 438.93 and 100.17
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.