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Finding the Fourth Proportional to 212,920.40, 319,175.80 and 165,509.20

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Solution

The fourth proportional to 212,920.40, 319,175.80 and 165,509.20 is: 248,104.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,920.40 : 319,175.80 = 165,509.20 : x
  2. Step 2: Convert to fraction form
    212,920.40/319,175.80 = 165,509.20/x
  3. Step 3: Cross multiply
    212,920.40x = 319,175.80 × 165,509.20
  4. Step 4: Simplify right side
    212,920.40x = 52,826,531,317.36
  5. Step 5: Solve for x
    x = 52,826,531,317.36/212,920.40
  6. Step 6: Final answer
    x = 248,104.60

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