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Finding the Fourth Proportional to 128,672.70, 193,009.05 and 33,902.70

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Solution

The fourth proportional to 128,672.70, 193,009.05 and 33,902.70 is: 50,854.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,672.70 : 193,009.05 = 33,902.70 : x
  2. Step 2: Convert to fraction form
    128,672.70/193,009.05 = 33,902.70/x
  3. Step 3: Cross multiply
    128,672.70x = 193,009.05 × 33,902.70
  4. Step 4: Simplify right side
    128,672.70x = 6,543,527,919.44
  5. Step 5: Solve for x
    x = 6,543,527,919.44/128,672.70
  6. Step 6: Final answer
    x = 50,854.05

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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.