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Finding the Fourth Proportional to 129,212.80, 193,825.60 and 67,004.80

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Solution

The fourth proportional to 129,212.80, 193,825.60 and 67,004.80 is: 100,510.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,212.80 : 193,825.60 = 67,004.80 : x
  2. Step 2: Convert to fraction form
    129,212.80/193,825.60 = 67,004.80/x
  3. Step 3: Cross multiply
    129,212.80x = 193,825.60 × 67,004.80
  4. Step 4: Simplify right side
    129,212.80x = 12,987,245,562.88
  5. Step 5: Solve for x
    x = 12,987,245,562.88/129,212.80
  6. Step 6: Final answer
    x = 100,510.52

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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.