Home / 78,278.35-117,321.30-36,099.88

Finding the Fourth Proportional to 78,278.35, 117,321.30 and 36,099.88

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Solution

The fourth proportional to 78,278.35, 117,321.30 and 36,099.88 is: 54,105.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,278.35 : 117,321.30 = 36,099.88 : x
  2. Step 2: Convert to fraction form
    78,278.35/117,321.30 = 36,099.88/x
  3. Step 3: Cross multiply
    78,278.35x = 117,321.30 × 36,099.88
  4. Step 4: Simplify right side
    78,278.35x = 4,235,284,851.44
  5. Step 5: Solve for x
    x = 4,235,284,851.44/78,278.35
  6. Step 6: Final answer
    x = 54,105.44

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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.