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Finding the Fourth Proportional to 204,930.40, 307,064.40 and 115,919.20

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Solution

The fourth proportional to 204,930.40, 307,064.40 and 115,919.20 is: 173,691.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,930.40 : 307,064.40 = 115,919.20 : x
  2. Step 2: Convert to fraction form
    204,930.40/307,064.40 = 115,919.20/x
  3. Step 3: Cross multiply
    204,930.40x = 307,064.40 × 115,919.20
  4. Step 4: Simplify right side
    204,930.40x = 35,594,659,596.48
  5. Step 5: Solve for x
    x = 35,594,659,596.48/204,930.40
  6. Step 6: Final answer
    x = 173,691.46

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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.