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Finding the Fourth Proportional to 78,145.05, 107,840.03 and 42,335.96

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Solution

The fourth proportional to 78,145.05, 107,840.03 and 42,335.96 is: 58,423.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,145.05 : 107,840.03 = 42,335.96 : x
  2. Step 2: Convert to fraction form
    78,145.05/107,840.03 = 42,335.96/x
  3. Step 3: Cross multiply
    78,145.05x = 107,840.03 × 42,335.96
  4. Step 4: Simplify right side
    78,145.05x = 4,565,510,445.60
  5. Step 5: Solve for x
    x = 4,565,510,445.60/78,145.05
  6. Step 6: Final answer
    x = 58,423.54

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