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Finding the Fourth Proportional to 90,015.40, 135,023.10 and 56,627.20

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Solution

The fourth proportional to 90,015.40, 135,023.10 and 56,627.20 is: 84,940.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,015.40 : 135,023.10 = 56,627.20 : x
  2. Step 2: Convert to fraction form
    90,015.40/135,023.10 = 56,627.20/x
  3. Step 3: Cross multiply
    90,015.40x = 135,023.10 × 56,627.20
  4. Step 4: Simplify right side
    90,015.40x = 7,645,980,088.32
  5. Step 5: Solve for x
    x = 7,645,980,088.32/90,015.40
  6. Step 6: Final answer
    x = 84,940.80

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