Home / 81.79-112.91-52.73

Finding the Fourth Proportional to 81.79, 112.91 and 52.73

Calculator

Solution

The fourth proportional to 81.79, 112.91 and 52.73 is: 72.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81.79 : 112.91 = 52.73 : x
  2. Step 2: Convert to fraction form
    81.79/112.91 = 52.73/x
  3. Step 3: Cross multiply
    81.79x = 112.91 × 52.73
  4. Step 4: Simplify right side
    81.79x = 5,953.74
  5. Step 5: Solve for x
    x = 5,953.74/81.79
  6. Step 6: Final answer
    x = 72.79

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.