Home / 78,147.78-117,226.94-38,694.30

Finding the Fourth Proportional to 78,147.78, 117,226.94 and 38,694.30

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Solution

The fourth proportional to 78,147.78, 117,226.94 and 38,694.30 is: 58,044.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,147.78 : 117,226.94 = 38,694.30 : x
  2. Step 2: Convert to fraction form
    78,147.78/117,226.94 = 38,694.30/x
  3. Step 3: Cross multiply
    78,147.78x = 117,226.94 × 38,694.30
  4. Step 4: Simplify right side
    78,147.78x = 4,536,014,384.44
  5. Step 5: Solve for x
    x = 4,536,014,384.44/78,147.78
  6. Step 6: Final answer
    x = 58,044.06

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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.