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Finding the Fourth Proportional to 100,587.80, 138,813.48 and 55,268.61

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Solution

The fourth proportional to 100,587.80, 138,813.48 and 55,268.61 is: 76,271.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,587.80 : 138,813.48 = 55,268.61 : x
  2. Step 2: Convert to fraction form
    100,587.80/138,813.48 = 55,268.61/x
  3. Step 3: Cross multiply
    100,587.80x = 138,813.48 × 55,268.61
  4. Step 4: Simplify right side
    100,587.80x = 7,672,028,088.86
  5. Step 5: Solve for x
    x = 7,672,028,088.86/100,587.80
  6. Step 6: Final answer
    x = 76,271.96

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