Home / 116.07-174.18-85.72

Finding the Fourth Proportional to 116.07, 174.18 and 85.72

Calculator

Solution

The fourth proportional to 116.07, 174.18 and 85.72 is: 128.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.07 : 174.18 = 85.72 : x
  2. Step 2: Convert to fraction form
    116.07/174.18 = 85.72/x
  3. Step 3: Cross multiply
    116.07x = 174.18 × 85.72
  4. Step 4: Simplify right side
    116.07x = 14,929.84
  5. Step 5: Solve for x
    x = 14,929.84/116.07
  6. Step 6: Final answer
    x = 128.63

Related Problems

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.