Home / 76,857.12-115,129.44-39,843.36

Finding the Fourth Proportional to 76,857.12, 115,129.44 and 39,843.36

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Solution

The fourth proportional to 76,857.12, 115,129.44 and 39,843.36 is: 59,684.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,857.12 : 115,129.44 = 39,843.36 : x
  2. Step 2: Convert to fraction form
    76,857.12/115,129.44 = 39,843.36/x
  3. Step 3: Cross multiply
    76,857.12x = 115,129.44 × 39,843.36
  4. Step 4: Simplify right side
    76,857.12x = 4,587,143,724.52
  5. Step 5: Solve for x
    x = 4,587,143,724.52/76,857.12
  6. Step 6: Final answer
    x = 59,684.04

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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.