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Finding the Fourth Proportional to 68,919.86, 95,103.11 and 38,708.28

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Solution

The fourth proportional to 68,919.86, 95,103.11 and 38,708.28 is: 53,413.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,919.86 : 95,103.11 = 38,708.28 : x
  2. Step 2: Convert to fraction form
    68,919.86/95,103.11 = 38,708.28/x
  3. Step 3: Cross multiply
    68,919.86x = 95,103.11 × 38,708.28
  4. Step 4: Simplify right side
    68,919.86x = 3,681,277,907.52
  5. Step 5: Solve for x
    x = 3,681,277,907.52/68,919.86
  6. Step 6: Final answer
    x = 53,413.89

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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.