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Finding the Fourth Proportional to 92,981.91, 128,314.42 and 50,540.45

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Solution

The fourth proportional to 92,981.91, 128,314.42 and 50,540.45 is: 69,745.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,981.91 : 128,314.42 = 50,540.45 : x
  2. Step 2: Convert to fraction form
    92,981.91/128,314.42 = 50,540.45/x
  3. Step 3: Cross multiply
    92,981.91x = 128,314.42 × 50,540.45
  4. Step 4: Simplify right side
    92,981.91x = 6,485,067,760.37
  5. Step 5: Solve for x
    x = 6,485,067,760.37/92,981.91
  6. Step 6: Final answer
    x = 69,745.48

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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.