Home / 78,469.20-117,761.40-52,165.20

Finding the Fourth Proportional to 78,469.20, 117,761.40 and 52,165.20

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Solution

The fourth proportional to 78,469.20, 117,761.40 and 52,165.20 is: 78,286.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,469.20 : 117,761.40 = 52,165.20 : x
  2. Step 2: Convert to fraction form
    78,469.20/117,761.40 = 52,165.20/x
  3. Step 3: Cross multiply
    78,469.20x = 117,761.40 × 52,165.20
  4. Step 4: Simplify right side
    78,469.20x = 6,143,046,983.28
  5. Step 5: Solve for x
    x = 6,143,046,983.28/78,469.20
  6. Step 6: Final answer
    x = 78,286.09

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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.