Home / 86.63-119.56-64.76

Finding the Fourth Proportional to 86.63, 119.56 and 64.76

Calculator

Solution

The fourth proportional to 86.63, 119.56 and 64.76 is: 89.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.63 : 119.56 = 64.76 : x
  2. Step 2: Convert to fraction form
    86.63/119.56 = 64.76/x
  3. Step 3: Cross multiply
    86.63x = 119.56 × 64.76
  4. Step 4: Simplify right side
    86.63x = 7,743.09
  5. Step 5: Solve for x
    x = 7,743.09/86.63
  6. Step 6: Final answer
    x = 89.38

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.