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Finding the Fourth Proportional to 75,119.78, 103,665.53 and 41,128.56

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Solution

The fourth proportional to 75,119.78, 103,665.53 and 41,128.56 is: 56,757.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,119.78 : 103,665.53 = 41,128.56 : x
  2. Step 2: Convert to fraction form
    75,119.78/103,665.53 = 41,128.56/x
  3. Step 3: Cross multiply
    75,119.78x = 103,665.53 × 41,128.56
  4. Step 4: Simplify right side
    75,119.78x = 4,263,613,970.54
  5. Step 5: Solve for x
    x = 4,263,613,970.54/75,119.78
  6. Step 6: Final answer
    x = 56,757.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.