Home / 85.26-127.80-64.92

Finding the Fourth Proportional to 85.26, 127.80 and 64.92

Calculator

Solution

The fourth proportional to 85.26, 127.80 and 64.92 is: 97.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85.26 : 127.80 = 64.92 : x
  2. Step 2: Convert to fraction form
    85.26/127.80 = 64.92/x
  3. Step 3: Cross multiply
    85.26x = 127.80 × 64.92
  4. Step 4: Simplify right side
    85.26x = 8,296.78
  5. Step 5: Solve for x
    x = 8,296.78/85.26
  6. Step 6: Final answer
    x = 97.31

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.