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Finding the Fourth Proportional to 125,477.78, 173,147.82 and 74,481.80

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Solution

The fourth proportional to 125,477.78, 173,147.82 and 74,481.80 is: 102,778.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,477.78 : 173,147.82 = 74,481.80 : x
  2. Step 2: Convert to fraction form
    125,477.78/173,147.82 = 74,481.80/x
  3. Step 3: Cross multiply
    125,477.78x = 173,147.82 × 74,481.80
  4. Step 4: Simplify right side
    125,477.78x = 12,896,361,299.68
  5. Step 5: Solve for x
    x = 12,896,361,299.68/125,477.78
  6. Step 6: Final answer
    x = 102,778.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.