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Finding the Fourth Proportional to 120,028.97, 180,070.24 and 45,149.73

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Solution

The fourth proportional to 120,028.97, 180,070.24 and 45,149.73 is: 67,734.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,028.97 : 180,070.24 = 45,149.73 : x
  2. Step 2: Convert to fraction form
    120,028.97/180,070.24 = 45,149.73/x
  3. Step 3: Cross multiply
    120,028.97x = 180,070.24 × 45,149.73
  4. Step 4: Simplify right side
    120,028.97x = 8,130,122,717.04
  5. Step 5: Solve for x
    x = 8,130,122,717.04/120,028.97
  6. Step 6: Final answer
    x = 67,734.67

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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.