Home / 186-279-72

Finding the Fourth Proportional to 186, 279 and 72

Calculator

Solution

The fourth proportional to 186, 279 and 72 is: 108

Step by Step Solution

  1. Step 1: Write the proportion equation
    186 : 279 = 72 : x
  2. Step 2: Convert to fraction form
    186/279 = 72/x
  3. Step 3: Cross multiply
    186x = 279 × 72
  4. Step 4: Simplify right side
    186x = 20,088
  5. Step 5: Solve for x
    x = 20,088/186
  6. Step 6: Final answer
    x = 108

Related Problems

Find fourth proportional to 93, 139.50 and 36
Half scale
Find fourth proportional to 372, 558 and 144
Double scale
Find fourth proportional to 187, 280.50 and 73
Similar ratio
Find fourth proportional to 279, 418.50 and 108
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.