Home / 76.58-105.71-47.49

Finding the Fourth Proportional to 76.58, 105.71 and 47.49

Calculator

Solution

The fourth proportional to 76.58, 105.71 and 47.49 is: 65.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.58 : 105.71 = 47.49 : x
  2. Step 2: Convert to fraction form
    76.58/105.71 = 47.49/x
  3. Step 3: Cross multiply
    76.58x = 105.71 × 47.49
  4. Step 4: Simplify right side
    76.58x = 5,019.53
  5. Step 5: Solve for x
    x = 5,019.53/76.58
  6. Step 6: Final answer
    x = 65.55

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.