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Finding the Fourth Proportional to 66,978.72, 100,468.80 and 25,416

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Solution

The fourth proportional to 66,978.72, 100,468.80 and 25,416 is: 38,124.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,978.72 : 100,468.80 = 25,416 : x
  2. Step 2: Convert to fraction form
    66,978.72/100,468.80 = 25,416/x
  3. Step 3: Cross multiply
    66,978.72x = 100,468.80 × 25,416
  4. Step 4: Simplify right side
    66,978.72x = 2,553,515,020.80
  5. Step 5: Solve for x
    x = 2,553,515,020.80/66,978.72
  6. Step 6: Final answer
    x = 38,124.27

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