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Finding the Fourth Proportional to 129,768.60, 194,652.90 and 80,164.20

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Solution

The fourth proportional to 129,768.60, 194,652.90 and 80,164.20 is: 120,246.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,768.60 : 194,652.90 = 80,164.20 : x
  2. Step 2: Convert to fraction form
    129,768.60/194,652.90 = 80,164.20/x
  3. Step 3: Cross multiply
    129,768.60x = 194,652.90 × 80,164.20
  4. Step 4: Simplify right side
    129,768.60x = 15,604,194,006.18
  5. Step 5: Solve for x
    x = 15,604,194,006.18/129,768.60
  6. Step 6: Final answer
    x = 120,246.30

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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.