Home / 71-106.46-55

Finding the Fourth Proportional to 71, 106.46 and 55

Calculator

Solution

The fourth proportional to 71, 106.46 and 55 is: 82.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71 : 106.46 = 55 : x
  2. Step 2: Convert to fraction form
    71/106.46 = 55/x
  3. Step 3: Cross multiply
    71x = 106.46 × 55
  4. Step 4: Simplify right side
    71x = 5,855.30
  5. Step 5: Solve for x
    x = 5,855.30/71
  6. Step 6: Final answer
    x = 82.47

Related Problems

Find fourth proportional to 35.50, 53.23 and 27.50
Half scale
Find fourth proportional to 142, 212.92 and 110
Double scale
Find fourth proportional to 72, 107.96 and 56
Similar ratio
Find fourth proportional to 106.50, 159.69 and 82.50
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.