Home / 76,917.59-115,370.90-20,760.89

Finding the Fourth Proportional to 76,917.59, 115,370.90 and 20,760.89

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Solution

The fourth proportional to 76,917.59, 115,370.90 and 20,760.89 is: 31,139.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,917.59 : 115,370.90 = 20,760.89 : x
  2. Step 2: Convert to fraction form
    76,917.59/115,370.90 = 20,760.89/x
  3. Step 3: Cross multiply
    76,917.59x = 115,370.90 × 20,760.89
  4. Step 4: Simplify right side
    76,917.59x = 2,395,202,564.10
  5. Step 5: Solve for x
    x = 2,395,202,564.10/76,917.59
  6. Step 6: Final answer
    x = 31,139.85

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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.