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Finding the Fourth Proportional to 103,671.60, 155,671.43 and 78,739.80

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Solution

The fourth proportional to 103,671.60, 155,671.43 and 78,739.80 is: 118,234.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,671.60 : 155,671.43 = 78,739.80 : x
  2. Step 2: Convert to fraction form
    103,671.60/155,671.43 = 78,739.80/x
  3. Step 3: Cross multiply
    103,671.60x = 155,671.43 × 78,739.80
  4. Step 4: Simplify right side
    103,671.60x = 12,257,537,263.91
  5. Step 5: Solve for x
    x = 12,257,537,263.91/103,671.60
  6. Step 6: Final answer
    x = 118,234.28

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