Home / 204,890.20-307,160-78,621.06

Finding the Fourth Proportional to 204,890.20, 307,160 and 78,621.06

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Solution

The fourth proportional to 204,890.20, 307,160 and 78,621.06 is: 117,864.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,890.20 : 307,160 = 78,621.06 : x
  2. Step 2: Convert to fraction form
    204,890.20/307,160 = 78,621.06/x
  3. Step 3: Cross multiply
    204,890.20x = 307,160 × 78,621.06
  4. Step 4: Simplify right side
    204,890.20x = 24,149,244,789.60
  5. Step 5: Solve for x
    x = 24,149,244,789.60/204,890.20
  6. Step 6: Final answer
    x = 117,864.32

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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.