Home / 76,857.31-115,281.30-28,816.43

Finding the Fourth Proportional to 76,857.31, 115,281.30 and 28,816.43

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Solution

The fourth proportional to 76,857.31, 115,281.30 and 28,816.43 is: 43,222.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,857.31 : 115,281.30 = 28,816.43 : x
  2. Step 2: Convert to fraction form
    76,857.31/115,281.30 = 28,816.43/x
  3. Step 3: Cross multiply
    76,857.31x = 115,281.30 × 28,816.43
  4. Step 4: Simplify right side
    76,857.31x = 3,321,995,511.76
  5. Step 5: Solve for x
    x = 3,321,995,511.76/76,857.31
  6. Step 6: Final answer
    x = 43,222.90

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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.