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Finding the Fourth Proportional to 100,855.86, 139,199.75 and 58,414.38

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Solution

The fourth proportional to 100,855.86, 139,199.75 and 58,414.38 is: 80,622.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,855.86 : 139,199.75 = 58,414.38 : x
  2. Step 2: Convert to fraction form
    100,855.86/139,199.75 = 58,414.38/x
  3. Step 3: Cross multiply
    100,855.86x = 139,199.75 × 58,414.38
  4. Step 4: Simplify right side
    100,855.86x = 8,131,267,092.41
  5. Step 5: Solve for x
    x = 8,131,267,092.41/100,855.86
  6. Step 6: Final answer
    x = 80,622.65

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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.