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Finding the Fourth Proportional to 128,374.92, 177,103.10 and 85,947.12

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Solution

The fourth proportional to 128,374.92, 177,103.10 and 85,947.12 is: 118,570.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,374.92 : 177,103.10 = 85,947.12 : x
  2. Step 2: Convert to fraction form
    128,374.92/177,103.10 = 85,947.12/x
  3. Step 3: Cross multiply
    128,374.92x = 177,103.10 × 85,947.12
  4. Step 4: Simplify right side
    128,374.92x = 15,221,501,388.07
  5. Step 5: Solve for x
    x = 15,221,501,388.07/128,374.92
  6. Step 6: Final answer
    x = 118,570.68

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