Home / 78,171.89-117,039.13-40,650.26

Finding the Fourth Proportional to 78,171.89, 117,039.13 and 40,650.26

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Solution

The fourth proportional to 78,171.89, 117,039.13 and 40,650.26 is: 60,861.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,171.89 : 117,039.13 = 40,650.26 : x
  2. Step 2: Convert to fraction form
    78,171.89/117,039.13 = 40,650.26/x
  3. Step 3: Cross multiply
    78,171.89x = 117,039.13 × 40,650.26
  4. Step 4: Simplify right side
    78,171.89x = 4,757,670,377.85
  5. Step 5: Solve for x
    x = 4,757,670,377.85/78,171.89
  6. Step 6: Final answer
    x = 60,861.66

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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.