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Finding the Fourth Proportional to 56,685.48, 78,222.64 and 31,187.48

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Solution

The fourth proportional to 56,685.48, 78,222.64 and 31,187.48 is: 43,036.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,685.48 : 78,222.64 = 31,187.48 : x
  2. Step 2: Convert to fraction form
    56,685.48/78,222.64 = 31,187.48/x
  3. Step 3: Cross multiply
    56,685.48x = 78,222.64 × 31,187.48
  4. Step 4: Simplify right side
    56,685.48x = 2,439,567,020.55
  5. Step 5: Solve for x
    x = 2,439,567,020.55/56,685.48
  6. Step 6: Final answer
    x = 43,036.89

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