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Finding the Fourth Proportional to 125,781.30, 188,671.98 and 86,218.47

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Solution

The fourth proportional to 125,781.30, 188,671.98 and 86,218.47 is: 129,327.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,781.30 : 188,671.98 = 86,218.47 : x
  2. Step 2: Convert to fraction form
    125,781.30/188,671.98 = 86,218.47/x
  3. Step 3: Cross multiply
    125,781.30x = 188,671.98 × 86,218.47
  4. Step 4: Simplify right side
    125,781.30x = 16,267,009,447.47
  5. Step 5: Solve for x
    x = 16,267,009,447.47/125,781.30
  6. Step 6: Final answer
    x = 129,327.73

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