Home / 102.65-153.83-85.44

Finding the Fourth Proportional to 102.65, 153.83 and 85.44

Calculator

Solution

The fourth proportional to 102.65, 153.83 and 85.44 is: 128.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.65 : 153.83 = 85.44 : x
  2. Step 2: Convert to fraction form
    102.65/153.83 = 85.44/x
  3. Step 3: Cross multiply
    102.65x = 153.83 × 85.44
  4. Step 4: Simplify right side
    102.65x = 13,142.81
  5. Step 5: Solve for x
    x = 13,142.81/102.65
  6. Step 6: Final answer
    x = 128.04

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.