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Finding the Fourth Proportional to 100,998.67, 139,378.13 and 55,677.42

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Solution

The fourth proportional to 100,998.67, 139,378.13 and 55,677.42 is: 76,834.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,998.67 : 139,378.13 = 55,677.42 : x
  2. Step 2: Convert to fraction form
    100,998.67/139,378.13 = 55,677.42/x
  3. Step 3: Cross multiply
    100,998.67x = 139,378.13 × 55,677.42
  4. Step 4: Simplify right side
    100,998.67x = 7,760,214,404.44
  5. Step 5: Solve for x
    x = 7,760,214,404.44/100,998.67
  6. Step 6: Final answer
    x = 76,834.82

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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.