Home / 76,789.76-115,176.85-20,622.57

Finding the Fourth Proportional to 76,789.76, 115,176.85 and 20,622.57

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Solution

The fourth proportional to 76,789.76, 115,176.85 and 20,622.57 is: 30,931.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,789.76 : 115,176.85 = 20,622.57 : x
  2. Step 2: Convert to fraction form
    76,789.76/115,176.85 = 20,622.57/x
  3. Step 3: Cross multiply
    76,789.76x = 115,176.85 × 20,622.57
  4. Step 4: Simplify right side
    76,789.76x = 2,375,242,703.76
  5. Step 5: Solve for x
    x = 2,375,242,703.76/76,789.76
  6. Step 6: Final answer
    x = 30,931.76

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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.