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Finding the Fourth Proportional to 402,425.60, 603,638.40 and 121,956.80

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Solution

The fourth proportional to 402,425.60, 603,638.40 and 121,956.80 is: 182,935.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,425.60 : 603,638.40 = 121,956.80 : x
  2. Step 2: Convert to fraction form
    402,425.60/603,638.40 = 121,956.80/x
  3. Step 3: Cross multiply
    402,425.60x = 603,638.40 × 121,956.80
  4. Step 4: Simplify right side
    402,425.60x = 73,617,807,621.12
  5. Step 5: Solve for x
    x = 73,617,807,621.12/402,425.60
  6. Step 6: Final answer
    x = 182,935.20

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