Home / 125,130.72-172,622.64-72,108

Finding the Fourth Proportional to 125,130.72, 172,622.64 and 72,108

Calculator

Solution

The fourth proportional to 125,130.72, 172,622.64 and 72,108 is: 99,475.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,130.72 : 172,622.64 = 72,108 : x
  2. Step 2: Convert to fraction form
    125,130.72/172,622.64 = 72,108/x
  3. Step 3: Cross multiply
    125,130.72x = 172,622.64 × 72,108
  4. Step 4: Simplify right side
    125,130.72x = 12,447,473,325.12
  5. Step 5: Solve for x
    x = 12,447,473,325.12/125,130.72
  6. Step 6: Final answer
    x = 99,475.76

Related Problems

Find fourth proportional to 62,565.36, 86,311.32 and 36,054
Half scale
Find fourth proportional to 250,261.44, 345,245.28 and 144,216
Double scale
Find fourth proportional to 125,131.72, 172,624.02 and 72,109
Similar ratio
Find fourth proportional to 187,696.08, 258,933.96 and 108,162
1.5x scale

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.