Home / 145-217.50-102.52

Finding the Fourth Proportional to 145, 217.50 and 102.52

Calculator

Solution

The fourth proportional to 145, 217.50 and 102.52 is: 153.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    145 : 217.50 = 102.52 : x
  2. Step 2: Convert to fraction form
    145/217.50 = 102.52/x
  3. Step 3: Cross multiply
    145x = 217.50 × 102.52
  4. Step 4: Simplify right side
    145x = 22,298.10
  5. Step 5: Solve for x
    x = 22,298.10/145
  6. Step 6: Final answer
    x = 153.78

Related Problems

Find fourth proportional to 72.50, 108.75 and 51.26
Half scale
Find fourth proportional to 290, 435 and 205.04
Double scale
Find fourth proportional to 146, 219 and 103.52
Similar ratio
Find fourth proportional to 217.50, 326.25 and 153.78
1.5x scale

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.