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Finding the Fourth Proportional to 78,739.76, 117,978.14 and 55,324.28

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Solution

The fourth proportional to 78,739.76, 117,978.14 and 55,324.28 is: 82,894.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,739.76 : 117,978.14 = 55,324.28 : x
  2. Step 2: Convert to fraction form
    78,739.76/117,978.14 = 55,324.28/x
  3. Step 3: Cross multiply
    78,739.76x = 117,978.14 × 55,324.28
  4. Step 4: Simplify right side
    78,739.76x = 6,527,055,651.24
  5. Step 5: Solve for x
    x = 6,527,055,651.24/78,739.76
  6. Step 6: Final answer
    x = 82,894.03

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.