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Finding the Fourth Proportional to 287,749.20, 431,623.80 and 147,781.20

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Solution

The fourth proportional to 287,749.20, 431,623.80 and 147,781.20 is: 221,671.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,749.20 : 431,623.80 = 147,781.20 : x
  2. Step 2: Convert to fraction form
    287,749.20/431,623.80 = 147,781.20/x
  3. Step 3: Cross multiply
    287,749.20x = 431,623.80 × 147,781.20
  4. Step 4: Simplify right side
    287,749.20x = 63,785,883,112.56
  5. Step 5: Solve for x
    x = 63,785,883,112.56/287,749.20
  6. Step 6: Final answer
    x = 221,671.80

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