Home / 80,850.40-121,297.20-72,145.60

Finding the Fourth Proportional to 80,850.40, 121,297.20 and 72,145.60

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Solution

The fourth proportional to 80,850.40, 121,297.20 and 72,145.60 is: 108,237.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,850.40 : 121,297.20 = 72,145.60 : x
  2. Step 2: Convert to fraction form
    80,850.40/121,297.20 = 72,145.60/x
  3. Step 3: Cross multiply
    80,850.40x = 121,297.20 × 72,145.60
  4. Step 4: Simplify right side
    80,850.40x = 8,751,059,272.32
  5. Step 5: Solve for x
    x = 8,751,059,272.32/80,850.40
  6. Step 6: Final answer
    x = 108,237.67

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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.