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Finding the Fourth Proportional to 130,729.72, 180,403.51 and 74,139.88

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Solution

The fourth proportional to 130,729.72, 180,403.51 and 74,139.88 is: 102,311.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,729.72 : 180,403.51 = 74,139.88 : x
  2. Step 2: Convert to fraction form
    130,729.72/180,403.51 = 74,139.88/x
  3. Step 3: Cross multiply
    130,729.72x = 180,403.51 × 74,139.88
  4. Step 4: Simplify right side
    130,729.72x = 13,375,093,310.26
  5. Step 5: Solve for x
    x = 13,375,093,310.26/130,729.72
  6. Step 6: Final answer
    x = 102,311.04

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