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Finding the Fourth Proportional to 128,848.50, 177,830.37 and 78,576.66

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Solution

The fourth proportional to 128,848.50, 177,830.37 and 78,576.66 is: 108,447.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,848.50 : 177,830.37 = 78,576.66 : x
  2. Step 2: Convert to fraction form
    128,848.50/177,830.37 = 78,576.66/x
  3. Step 3: Cross multiply
    128,848.50x = 177,830.37 × 78,576.66
  4. Step 4: Simplify right side
    128,848.50x = 13,973,316,521.16
  5. Step 5: Solve for x
    x = 13,973,316,521.16/128,848.50
  6. Step 6: Final answer
    x = 108,447.65

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