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Finding the Fourth Proportional to 228,643.11, 342,981.27 and 78,881.40

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Solution

The fourth proportional to 228,643.11, 342,981.27 and 78,881.40 is: 118,327.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,643.11 : 342,981.27 = 78,881.40 : x
  2. Step 2: Convert to fraction form
    228,643.11/342,981.27 = 78,881.40/x
  3. Step 3: Cross multiply
    228,643.11x = 342,981.27 × 78,881.40
  4. Step 4: Simplify right side
    228,643.11x = 27,054,842,751.38
  5. Step 5: Solve for x
    x = 27,054,842,751.38/228,643.11
  6. Step 6: Final answer
    x = 118,327.83

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