Home / 120,450.96-180,540.36-90,775.80

Finding the Fourth Proportional to 120,450.96, 180,540.36 and 90,775.80

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Solution

The fourth proportional to 120,450.96, 180,540.36 and 90,775.80 is: 136,061.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,450.96 : 180,540.36 = 90,775.80 : x
  2. Step 2: Convert to fraction form
    120,450.96/180,540.36 = 90,775.80/x
  3. Step 3: Cross multiply
    120,450.96x = 180,540.36 × 90,775.80
  4. Step 4: Simplify right side
    120,450.96x = 16,388,695,611.29
  5. Step 5: Solve for x
    x = 16,388,695,611.29/120,450.96
  6. Step 6: Final answer
    x = 136,061.15

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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.