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Finding the Fourth Proportional to 128,481.82, 177,292.44 and 74,773.96

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Solution

The fourth proportional to 128,481.82, 177,292.44 and 74,773.96 is: 103,180.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,481.82 : 177,292.44 = 74,773.96 : x
  2. Step 2: Convert to fraction form
    128,481.82/177,292.44 = 74,773.96/x
  3. Step 3: Cross multiply
    128,481.82x = 177,292.44 × 74,773.96
  4. Step 4: Simplify right side
    128,481.82x = 13,256,857,816.86
  5. Step 5: Solve for x
    x = 13,256,857,816.86/128,481.82
  6. Step 6: Final answer
    x = 103,180.81

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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.