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Finding the Fourth Proportional to 72,186.46, 99,617.65 and 40,354.67

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Solution

The fourth proportional to 72,186.46, 99,617.65 and 40,354.67 is: 55,689.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,186.46 : 99,617.65 = 40,354.67 : x
  2. Step 2: Convert to fraction form
    72,186.46/99,617.65 = 40,354.67/x
  3. Step 3: Cross multiply
    72,186.46x = 99,617.65 × 40,354.67
  4. Step 4: Simplify right side
    72,186.46x = 4,020,037,540.08
  5. Step 5: Solve for x
    x = 4,020,037,540.08/72,186.46
  6. Step 6: Final answer
    x = 55,689.64

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