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Finding the Fourth Proportional to 256,221.80, 384,332.70 and 163,140.20

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Solution

The fourth proportional to 256,221.80, 384,332.70 and 163,140.20 is: 244,710.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,221.80 : 384,332.70 = 163,140.20 : x
  2. Step 2: Convert to fraction form
    256,221.80/384,332.70 = 163,140.20/x
  3. Step 3: Cross multiply
    256,221.80x = 384,332.70 × 163,140.20
  4. Step 4: Simplify right side
    256,221.80x = 62,700,113,544.54
  5. Step 5: Solve for x
    x = 62,700,113,544.54/256,221.80
  6. Step 6: Final answer
    x = 244,710.30

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