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Finding the Fourth Proportional to 139,905.36, 209,812.68 and 46,386

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Solution

The fourth proportional to 139,905.36, 209,812.68 and 46,386 is: 69,563.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,905.36 : 209,812.68 = 46,386 : x
  2. Step 2: Convert to fraction form
    139,905.36/209,812.68 = 46,386/x
  3. Step 3: Cross multiply
    139,905.36x = 209,812.68 × 46,386
  4. Step 4: Simplify right side
    139,905.36x = 9,732,370,974.48
  5. Step 5: Solve for x
    x = 9,732,370,974.48/139,905.36
  6. Step 6: Final answer
    x = 69,563.96

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