Home / 91.97-138.12-61.14

Finding the Fourth Proportional to 91.97, 138.12 and 61.14

Calculator

Solution

The fourth proportional to 91.97, 138.12 and 61.14 is: 91.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.97 : 138.12 = 61.14 : x
  2. Step 2: Convert to fraction form
    91.97/138.12 = 61.14/x
  3. Step 3: Cross multiply
    91.97x = 138.12 × 61.14
  4. Step 4: Simplify right side
    91.97x = 8,444.66
  5. Step 5: Solve for x
    x = 8,444.66/91.97
  6. Step 6: Final answer
    x = 91.82

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.