Home / 76,852.16-115,265.20-20,679.75

Finding the Fourth Proportional to 76,852.16, 115,265.20 and 20,679.75

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Solution

The fourth proportional to 76,852.16, 115,265.20 and 20,679.75 is: 31,016.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,852.16 : 115,265.20 = 20,679.75 : x
  2. Step 2: Convert to fraction form
    76,852.16/115,265.20 = 20,679.75/x
  3. Step 3: Cross multiply
    76,852.16x = 115,265.20 × 20,679.75
  4. Step 4: Simplify right side
    76,852.16x = 2,383,655,519.70
  5. Step 5: Solve for x
    x = 2,383,655,519.70/76,852.16
  6. Step 6: Final answer
    x = 31,016.12

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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.