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Finding the Fourth Proportional to 138,503.21, 191,134.35 and 74,840.99

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Solution

The fourth proportional to 138,503.21, 191,134.35 and 74,840.99 is: 103,280.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,503.21 : 191,134.35 = 74,840.99 : x
  2. Step 2: Convert to fraction form
    138,503.21/191,134.35 = 74,840.99/x
  3. Step 3: Cross multiply
    138,503.21x = 191,134.35 × 74,840.99
  4. Step 4: Simplify right side
    138,503.21x = 14,304,683,021.33
  5. Step 5: Solve for x
    x = 14,304,683,021.33/138,503.21
  6. Step 6: Final answer
    x = 103,280.52

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