Home / 76,861.08-115,234.20-51,830.86

Finding the Fourth Proportional to 76,861.08, 115,234.20 and 51,830.86

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Solution

The fourth proportional to 76,861.08, 115,234.20 and 51,830.86 is: 77,707.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,861.08 : 115,234.20 = 51,830.86 : x
  2. Step 2: Convert to fraction form
    76,861.08/115,234.20 = 51,830.86/x
  3. Step 3: Cross multiply
    76,861.08x = 115,234.20 × 51,830.86
  4. Step 4: Simplify right side
    76,861.08x = 5,972,687,687.41
  5. Step 5: Solve for x
    x = 5,972,687,687.41/76,861.08
  6. Step 6: Final answer
    x = 77,707.57

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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.