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Finding the Fourth Proportional to 52,118.40, 78,158.16 and 20,943.12

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Solution

The fourth proportional to 52,118.40, 78,158.16 and 20,943.12 is: 31,406.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,118.40 : 78,158.16 = 20,943.12 : x
  2. Step 2: Convert to fraction form
    52,118.40/78,158.16 = 20,943.12/x
  3. Step 3: Cross multiply
    52,118.40x = 78,158.16 × 20,943.12
  4. Step 4: Simplify right side
    52,118.40x = 1,636,875,723.86
  5. Step 5: Solve for x
    x = 1,636,875,723.86/52,118.40
  6. Step 6: Final answer
    x = 31,406.87

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