Home / 184.90-255.21-122.80

Finding the Fourth Proportional to 184.90, 255.21 and 122.80

Calculator

Solution

The fourth proportional to 184.90, 255.21 and 122.80 is: 169.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    184.90 : 255.21 = 122.80 : x
  2. Step 2: Convert to fraction form
    184.90/255.21 = 122.80/x
  3. Step 3: Cross multiply
    184.90x = 255.21 × 122.80
  4. Step 4: Simplify right side
    184.90x = 31,339.79
  5. Step 5: Solve for x
    x = 31,339.79/184.90
  6. Step 6: Final answer
    x = 169.50

Related Problems

Find fourth proportional to 92.45, 127.61 and 61.40
Half scale
Find fourth proportional to 369.80, 510.42 and 245.60
Double scale
Find fourth proportional to 185.90, 256.59 and 123.80
Similar ratio
Find fourth proportional to 277.35, 382.82 and 184.20
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.