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Finding the Fourth Proportional to 75,978.45, 113,984.06 and 40,909.95

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Solution

The fourth proportional to 75,978.45, 113,984.06 and 40,909.95 is: 61,373.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,978.45 : 113,984.06 = 40,909.95 : x
  2. Step 2: Convert to fraction form
    75,978.45/113,984.06 = 40,909.95/x
  3. Step 3: Cross multiply
    75,978.45x = 113,984.06 × 40,909.95
  4. Step 4: Simplify right side
    75,978.45x = 4,663,081,990.85
  5. Step 5: Solve for x
    x = 4,663,081,990.85/75,978.45
  6. Step 6: Final answer
    x = 61,373.74

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