Home / 88.19-121.70-53.69

Finding the Fourth Proportional to 88.19, 121.70 and 53.69

Calculator

Solution

The fourth proportional to 88.19, 121.70 and 53.69 is: 74.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.19 : 121.70 = 53.69 : x
  2. Step 2: Convert to fraction form
    88.19/121.70 = 53.69/x
  3. Step 3: Cross multiply
    88.19x = 121.70 × 53.69
  4. Step 4: Simplify right side
    88.19x = 6,533.70
  5. Step 5: Solve for x
    x = 6,533.70/88.19
  6. Step 6: Final answer
    x = 74.09

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.