Home / 78,399.54-108,187.27-42,589.44

Finding the Fourth Proportional to 78,399.54, 108,187.27 and 42,589.44

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Solution

The fourth proportional to 78,399.54, 108,187.27 and 42,589.44 is: 58,771.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,399.54 : 108,187.27 = 42,589.44 : x
  2. Step 2: Convert to fraction form
    78,399.54/108,187.27 = 42,589.44/x
  3. Step 3: Cross multiply
    78,399.54x = 108,187.27 × 42,589.44
  4. Step 4: Simplify right side
    78,399.54x = 4,607,635,137.96
  5. Step 5: Solve for x
    x = 4,607,635,137.96/78,399.54
  6. Step 6: Final answer
    x = 58,771.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.