Home / 188.69-282.76-85.72

Finding the Fourth Proportional to 188.69, 282.76 and 85.72

Calculator

Solution

The fourth proportional to 188.69, 282.76 and 85.72 is: 128.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.69 : 282.76 = 85.72 : x
  2. Step 2: Convert to fraction form
    188.69/282.76 = 85.72/x
  3. Step 3: Cross multiply
    188.69x = 282.76 × 85.72
  4. Step 4: Simplify right side
    188.69x = 24,238.19
  5. Step 5: Solve for x
    x = 24,238.19/188.69
  6. Step 6: Final answer
    x = 128.46

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.