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Finding the Fourth Proportional to 103,078.62, 154,488.60 and 55,691.73

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Solution

The fourth proportional to 103,078.62, 154,488.60 and 55,691.73 is: 83,467.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,078.62 : 154,488.60 = 55,691.73 : x
  2. Step 2: Convert to fraction form
    103,078.62/154,488.60 = 55,691.73/x
  3. Step 3: Cross multiply
    103,078.62x = 154,488.60 × 55,691.73
  4. Step 4: Simplify right side
    103,078.62x = 8,603,737,399.28
  5. Step 5: Solve for x
    x = 8,603,737,399.28/103,078.62
  6. Step 6: Final answer
    x = 83,467.72

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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.