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Finding the Fourth Proportional to 136,672.80, 204,620.40 and 121,120.80

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Solution

The fourth proportional to 136,672.80, 204,620.40 and 121,120.80 is: 181,336.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,672.80 : 204,620.40 = 121,120.80 : x
  2. Step 2: Convert to fraction form
    136,672.80/204,620.40 = 121,120.80/x
  3. Step 3: Cross multiply
    136,672.80x = 204,620.40 × 121,120.80
  4. Step 4: Simplify right side
    136,672.80x = 24,783,786,544.32
  5. Step 5: Solve for x
    x = 24,783,786,544.32/136,672.80
  6. Step 6: Final answer
    x = 181,336.64

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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.