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Finding the Fourth Proportional to 129,768.80, 194,659.60 and 67,560.80

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Solution

The fourth proportional to 129,768.80, 194,659.60 and 67,560.80 is: 101,344.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,768.80 : 194,659.60 = 67,560.80 : x
  2. Step 2: Convert to fraction form
    129,768.80/194,659.60 = 67,560.80/x
  3. Step 3: Cross multiply
    129,768.80x = 194,659.60 × 67,560.80
  4. Step 4: Simplify right side
    129,768.80x = 13,151,358,303.68
  5. Step 5: Solve for x
    x = 13,151,358,303.68/129,768.80
  6. Step 6: Final answer
    x = 101,344.53

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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.