Home / 78,326.58-117,451.31-28,399.22

Finding the Fourth Proportional to 78,326.58, 117,451.31 and 28,399.22

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Solution

The fourth proportional to 78,326.58, 117,451.31 and 28,399.22 is: 42,584.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,326.58 : 117,451.31 = 28,399.22 : x
  2. Step 2: Convert to fraction form
    78,326.58/117,451.31 = 28,399.22/x
  3. Step 3: Cross multiply
    78,326.58x = 117,451.31 × 28,399.22
  4. Step 4: Simplify right side
    78,326.58x = 3,335,524,862.73
  5. Step 5: Solve for x
    x = 3,335,524,862.73/78,326.58
  6. Step 6: Final answer
    x = 42,584.84

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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.