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Finding the Fourth Proportional to 205,375.60, 307,930.20 and 87,014.80

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Solution

The fourth proportional to 205,375.60, 307,930.20 and 87,014.80 is: 130,465.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,375.60 : 307,930.20 = 87,014.80 : x
  2. Step 2: Convert to fraction form
    205,375.60/307,930.20 = 87,014.80/x
  3. Step 3: Cross multiply
    205,375.60x = 307,930.20 × 87,014.80
  4. Step 4: Simplify right side
    205,375.60x = 26,794,484,766.96
  5. Step 5: Solve for x
    x = 26,794,484,766.96/205,375.60
  6. Step 6: Final answer
    x = 130,465.77

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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.