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Finding the Fourth Proportional to 129,796.40, 194,694.60 and 74,346.80

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Solution

The fourth proportional to 129,796.40, 194,694.60 and 74,346.80 is: 111,520.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,796.40 : 194,694.60 = 74,346.80 : x
  2. Step 2: Convert to fraction form
    129,796.40/194,694.60 = 74,346.80/x
  3. Step 3: Cross multiply
    129,796.40x = 194,694.60 × 74,346.80
  4. Step 4: Simplify right side
    129,796.40x = 14,474,920,487.28
  5. Step 5: Solve for x
    x = 14,474,920,487.28/129,796.40
  6. Step 6: Final answer
    x = 111,520.20

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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.