Home / 156-233.91-138

Finding the Fourth Proportional to 156, 233.91 and 138

Calculator

Solution

The fourth proportional to 156, 233.91 and 138 is: 206.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    156 : 233.91 = 138 : x
  2. Step 2: Convert to fraction form
    156/233.91 = 138/x
  3. Step 3: Cross multiply
    156x = 233.91 × 138
  4. Step 4: Simplify right side
    156x = 32,279.58
  5. Step 5: Solve for x
    x = 32,279.58/156
  6. Step 6: Final answer
    x = 206.92

Related Problems

Find fourth proportional to 78, 116.96 and 69
Half scale
Find fourth proportional to 312, 467.82 and 276
Double scale
Find fourth proportional to 157, 235.41 and 139
Similar ratio
Find fourth proportional to 234, 350.87 and 207
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.