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Finding the Fourth Proportional to 124,789.86, 172,213.44 and 76,390.80

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Solution

The fourth proportional to 124,789.86, 172,213.44 and 76,390.80 is: 105,421.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,789.86 : 172,213.44 = 76,390.80 : x
  2. Step 2: Convert to fraction form
    124,789.86/172,213.44 = 76,390.80/x
  3. Step 3: Cross multiply
    124,789.86x = 172,213.44 × 76,390.80
  4. Step 4: Simplify right side
    124,789.86x = 13,155,522,452.35
  5. Step 5: Solve for x
    x = 13,155,522,452.35/124,789.86
  6. Step 6: Final answer
    x = 105,421.41

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