Home / 128,936.30-193,404.45-100,942.70

Finding the Fourth Proportional to 128,936.30, 193,404.45 and 100,942.70

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Solution

The fourth proportional to 128,936.30, 193,404.45 and 100,942.70 is: 151,414.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,936.30 : 193,404.45 = 100,942.70 : x
  2. Step 2: Convert to fraction form
    128,936.30/193,404.45 = 100,942.70/x
  3. Step 3: Cross multiply
    128,936.30x = 193,404.45 × 100,942.70
  4. Step 4: Simplify right side
    128,936.30x = 19,522,767,375.02
  5. Step 5: Solve for x
    x = 19,522,767,375.02/128,936.30
  6. Step 6: Final answer
    x = 151,414.05

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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.