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Finding the Fourth Proportional to 128,732.72, 177,464.96 and 90,375.44

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Solution

The fourth proportional to 128,732.72, 177,464.96 and 90,375.44 is: 124,587.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,732.72 : 177,464.96 = 90,375.44 : x
  2. Step 2: Convert to fraction form
    128,732.72/177,464.96 = 90,375.44/x
  3. Step 3: Cross multiply
    128,732.72x = 177,464.96 × 90,375.44
  4. Step 4: Simplify right side
    128,732.72x = 16,038,473,844.58
  5. Step 5: Solve for x
    x = 16,038,473,844.58/128,732.72
  6. Step 6: Final answer
    x = 124,587.39

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