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Finding the Fourth Proportional to 129,787.87, 179,106.92 and 72,426.58

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Solution

The fourth proportional to 129,787.87, 179,106.92 and 72,426.58 is: 99,948.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,787.87 : 179,106.92 = 72,426.58 : x
  2. Step 2: Convert to fraction form
    129,787.87/179,106.92 = 72,426.58/x
  3. Step 3: Cross multiply
    129,787.87x = 179,106.92 × 72,426.58
  4. Step 4: Simplify right side
    129,787.87x = 12,972,101,403.23
  5. Step 5: Solve for x
    x = 12,972,101,403.23/129,787.87
  6. Step 6: Final answer
    x = 99,948.49

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