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Finding the Fourth Proportional to 72,610.80, 108,916.20 and 51,615.60

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Solution

The fourth proportional to 72,610.80, 108,916.20 and 51,615.60 is: 77,423.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,610.80 : 108,916.20 = 51,615.60 : x
  2. Step 2: Convert to fraction form
    72,610.80/108,916.20 = 51,615.60/x
  3. Step 3: Cross multiply
    72,610.80x = 108,916.20 × 51,615.60
  4. Step 4: Simplify right side
    72,610.80x = 5,621,775,012.72
  5. Step 5: Solve for x
    x = 5,621,775,012.72/72,610.80
  6. Step 6: Final answer
    x = 77,423.40

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