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Finding the Fourth Proportional to 81,054.32, 121,593.68 and 28,454.56

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Solution

The fourth proportional to 81,054.32, 121,593.68 and 28,454.56 is: 42,686.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,054.32 : 121,593.68 = 28,454.56 : x
  2. Step 2: Convert to fraction form
    81,054.32/121,593.68 = 28,454.56/x
  3. Step 3: Cross multiply
    81,054.32x = 121,593.68 × 28,454.56
  4. Step 4: Simplify right side
    81,054.32x = 3,459,894,663.18
  5. Step 5: Solve for x
    x = 3,459,894,663.18/81,054.32
  6. Step 6: Final answer
    x = 42,686.12

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