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Finding the Fourth Proportional to 129,228.80, 193,849.60 and 67,020.80

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Solution

The fourth proportional to 129,228.80, 193,849.60 and 67,020.80 is: 100,534.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,228.80 : 193,849.60 = 67,020.80 : x
  2. Step 2: Convert to fraction form
    129,228.80/193,849.60 = 67,020.80/x
  3. Step 3: Cross multiply
    129,228.80x = 193,849.60 × 67,020.80
  4. Step 4: Simplify right side
    129,228.80x = 12,991,955,271.68
  5. Step 5: Solve for x
    x = 12,991,955,271.68/129,228.80
  6. Step 6: Final answer
    x = 100,534.52

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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.