Home / 78,388.27-117,622.62-38,406.49

Finding the Fourth Proportional to 78,388.27, 117,622.62 and 38,406.49

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Solution

The fourth proportional to 78,388.27, 117,622.62 and 38,406.49 is: 57,629.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,388.27 : 117,622.62 = 38,406.49 : x
  2. Step 2: Convert to fraction form
    78,388.27/117,622.62 = 38,406.49/x
  3. Step 3: Cross multiply
    78,388.27x = 117,622.62 × 38,406.49
  4. Step 4: Simplify right side
    78,388.27x = 4,517,471,786.77
  5. Step 5: Solve for x
    x = 4,517,471,786.77/78,388.27
  6. Step 6: Final answer
    x = 57,629.44

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Why These Related Problems?

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