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Finding the Fourth Proportional to 99,815.20, 149,722.80 and 91,650.40

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Solution

The fourth proportional to 99,815.20, 149,722.80 and 91,650.40 is: 137,475.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,815.20 : 149,722.80 = 91,650.40 : x
  2. Step 2: Convert to fraction form
    99,815.20/149,722.80 = 91,650.40/x
  3. Step 3: Cross multiply
    99,815.20x = 149,722.80 × 91,650.40
  4. Step 4: Simplify right side
    99,815.20x = 13,722,154,509.12
  5. Step 5: Solve for x
    x = 13,722,154,509.12/99,815.20
  6. Step 6: Final answer
    x = 137,475.60

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