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Finding the Fourth Proportional to 287,632.20, 431,642.70 and 161,272.20

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Solution

The fourth proportional to 287,632.20, 431,642.70 and 161,272.20 is: 242,017.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,632.20 : 431,642.70 = 161,272.20 : x
  2. Step 2: Convert to fraction form
    287,632.20/431,642.70 = 161,272.20/x
  3. Step 3: Cross multiply
    287,632.20x = 431,642.70 × 161,272.20
  4. Step 4: Simplify right side
    287,632.20x = 69,611,967,842.94
  5. Step 5: Solve for x
    x = 69,611,967,842.94/287,632.20
  6. Step 6: Final answer
    x = 242,017.30

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