Home / 181.47-272.01-90

Finding the Fourth Proportional to 181.47, 272.01 and 90

Calculator

Solution

The fourth proportional to 181.47, 272.01 and 90 is: 134.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.47 : 272.01 = 90 : x
  2. Step 2: Convert to fraction form
    181.47/272.01 = 90/x
  3. Step 3: Cross multiply
    181.47x = 272.01 × 90
  4. Step 4: Simplify right side
    181.47x = 24,480.90
  5. Step 5: Solve for x
    x = 24,480.90/181.47
  6. Step 6: Final answer
    x = 134.90

Related Problems

Find fourth proportional to 90.74, 136.01 and 45
Half scale
Find fourth proportional to 362.94, 544.02 and 180
Double scale
Find fourth proportional to 182.47, 273.51 and 91
Similar ratio
Find fourth proportional to 272.21, 408.02 and 135
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.