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Finding the Fourth Proportional to 128,792.94, 177,822.24 and 80,468.44

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Solution

The fourth proportional to 128,792.94, 177,822.24 and 80,468.44 is: 111,101.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,792.94 : 177,822.24 = 80,468.44 : x
  2. Step 2: Convert to fraction form
    128,792.94/177,822.24 = 80,468.44/x
  3. Step 3: Cross multiply
    128,792.94x = 177,822.24 × 80,468.44
  4. Step 4: Simplify right side
    128,792.94x = 14,309,078,629.07
  5. Step 5: Solve for x
    x = 14,309,078,629.07/128,792.94
  6. Step 6: Final answer
    x = 111,101.42

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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.