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Finding the Fourth Proportional to 78,366.78, 117,549.63 and 31,618.98

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Solution

The fourth proportional to 78,366.78, 117,549.63 and 31,618.98 is: 47,428.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,366.78 : 117,549.63 = 31,618.98 : x
  2. Step 2: Convert to fraction form
    78,366.78/117,549.63 = 31,618.98/x
  3. Step 3: Cross multiply
    78,366.78x = 117,549.63 × 31,618.98
  4. Step 4: Simplify right side
    78,366.78x = 3,716,799,399.98
  5. Step 5: Solve for x
    x = 3,716,799,399.98/78,366.78
  6. Step 6: Final answer
    x = 47,428.25

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