Home / 89.76-123.72-73.35

Finding the Fourth Proportional to 89.76, 123.72 and 73.35

Calculator

Solution

The fourth proportional to 89.76, 123.72 and 73.35 is: 101.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.76 : 123.72 = 73.35 : x
  2. Step 2: Convert to fraction form
    89.76/123.72 = 73.35/x
  3. Step 3: Cross multiply
    89.76x = 123.72 × 73.35
  4. Step 4: Simplify right side
    89.76x = 9,075.33
  5. Step 5: Solve for x
    x = 9,075.33/89.76
  6. Step 6: Final answer
    x = 101.11

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.