Home / 91.30-125.85-63.63

Finding the Fourth Proportional to 91.30, 125.85 and 63.63

Calculator

Solution

The fourth proportional to 91.30, 125.85 and 63.63 is: 87.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.30 : 125.85 = 63.63 : x
  2. Step 2: Convert to fraction form
    91.30/125.85 = 63.63/x
  3. Step 3: Cross multiply
    91.30x = 125.85 × 63.63
  4. Step 4: Simplify right side
    91.30x = 8,007.84
  5. Step 5: Solve for x
    x = 8,007.84/91.30
  6. Step 6: Final answer
    x = 87.71

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.