Home / 182.78-252.18-117.21

Finding the Fourth Proportional to 182.78, 252.18 and 117.21

Calculator

Solution

The fourth proportional to 182.78, 252.18 and 117.21 is: 161.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    182.78 : 252.18 = 117.21 : x
  2. Step 2: Convert to fraction form
    182.78/252.18 = 117.21/x
  3. Step 3: Cross multiply
    182.78x = 252.18 × 117.21
  4. Step 4: Simplify right side
    182.78x = 29,558.02
  5. Step 5: Solve for x
    x = 29,558.02/182.78
  6. Step 6: Final answer
    x = 161.72

Related Problems

Find fourth proportional to 91.39, 126.09 and 58.61
Half scale
Find fourth proportional to 365.55, 504.36 and 234.42
Double scale
Find fourth proportional to 183.78, 253.56 and 118.21
Similar ratio
Find fourth proportional to 274.16, 378.27 and 175.82
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.