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Finding the Fourth Proportional to 80,110.60, 120,165.90 and 69,742.60

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Solution

The fourth proportional to 80,110.60, 120,165.90 and 69,742.60 is: 104,613.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,110.60 : 120,165.90 = 69,742.60 : x
  2. Step 2: Convert to fraction form
    80,110.60/120,165.90 = 69,742.60/x
  3. Step 3: Cross multiply
    80,110.60x = 120,165.90 × 69,742.60
  4. Step 4: Simplify right side
    80,110.60x = 8,380,682,297.34
  5. Step 5: Solve for x
    x = 8,380,682,297.34/80,110.60
  6. Step 6: Final answer
    x = 104,613.90

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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.