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Finding the Fourth Proportional to 100,568.32, 138,780.48 and 55,859.20

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Solution

The fourth proportional to 100,568.32, 138,780.48 and 55,859.20 is: 77,083.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,568.32 : 138,780.48 = 55,859.20 : x
  2. Step 2: Convert to fraction form
    100,568.32/138,780.48 = 55,859.20/x
  3. Step 3: Cross multiply
    100,568.32x = 138,780.48 × 55,859.20
  4. Step 4: Simplify right side
    100,568.32x = 7,752,166,588.42
  5. Step 5: Solve for x
    x = 7,752,166,588.42/100,568.32
  6. Step 6: Final answer
    x = 77,083.58

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