Home / 78,764.94-117,645.27-71,257.02

Finding the Fourth Proportional to 78,764.94, 117,645.27 and 71,257.02

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Solution

The fourth proportional to 78,764.94, 117,645.27 and 71,257.02 is: 106,431.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,764.94 : 117,645.27 = 71,257.02 : x
  2. Step 2: Convert to fraction form
    78,764.94/117,645.27 = 71,257.02/x
  3. Step 3: Cross multiply
    78,764.94x = 117,645.27 × 71,257.02
  4. Step 4: Simplify right side
    78,764.94x = 8,383,051,357.30
  5. Step 5: Solve for x
    x = 8,383,051,357.30/78,764.94
  6. Step 6: Final answer
    x = 106,431.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.