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Finding the Fourth Proportional to 100,874.94, 139,202.38 and 55,556.84

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Solution

The fourth proportional to 100,874.94, 139,202.38 and 55,556.84 is: 76,665.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,874.94 : 139,202.38 = 55,556.84 : x
  2. Step 2: Convert to fraction form
    100,874.94/139,202.38 = 55,556.84/x
  3. Step 3: Cross multiply
    100,874.94x = 139,202.38 × 55,556.84
  4. Step 4: Simplify right side
    100,874.94x = 7,733,644,353.28
  5. Step 5: Solve for x
    x = 7,733,644,353.28/100,874.94
  6. Step 6: Final answer
    x = 76,665.66

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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.