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Finding the Fourth Proportional to 105,909.79, 158,901.14 and 66,420.67

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Solution

The fourth proportional to 105,909.79, 158,901.14 and 66,420.67 is: 99,653.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,909.79 : 158,901.14 = 66,420.67 : x
  2. Step 2: Convert to fraction form
    105,909.79/158,901.14 = 66,420.67/x
  3. Step 3: Cross multiply
    105,909.79x = 158,901.14 × 66,420.67
  4. Step 4: Simplify right side
    105,909.79x = 10,554,320,182.56
  5. Step 5: Solve for x
    x = 10,554,320,182.56/105,909.79
  6. Step 6: Final answer
    x = 99,653.87

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