Home / 118-177-115

Finding the Fourth Proportional to 118, 177 and 115

Calculator

Solution

The fourth proportional to 118, 177 and 115 is: 172.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    118 : 177 = 115 : x
  2. Step 2: Convert to fraction form
    118/177 = 115/x
  3. Step 3: Cross multiply
    118x = 177 × 115
  4. Step 4: Simplify right side
    118x = 20,355
  5. Step 5: Solve for x
    x = 20,355/118
  6. Step 6: Final answer
    x = 172.50

Related Problems

Find fourth proportional to 59, 88.50 and 57.50
Half scale
Find fourth proportional to 236, 354 and 230
Double scale
Find fourth proportional to 119, 178.50 and 116
Similar ratio
Find fourth proportional to 177, 265.50 and 172.50
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.