Home / 128,917.78-193,376.09-40,171.34

Finding the Fourth Proportional to 128,917.78, 193,376.09 and 40,171.34

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Solution

The fourth proportional to 128,917.78, 193,376.09 and 40,171.34 is: 60,256.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,917.78 : 193,376.09 = 40,171.34 : x
  2. Step 2: Convert to fraction form
    128,917.78/193,376.09 = 40,171.34/x
  3. Step 3: Cross multiply
    128,917.78x = 193,376.09 × 40,171.34
  4. Step 4: Simplify right side
    128,917.78x = 7,768,177,243.13
  5. Step 5: Solve for x
    x = 7,768,177,243.13/128,917.78
  6. Step 6: Final answer
    x = 60,256.83

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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.