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Finding the Fourth Proportional to 92,832.78, 128,109.38 and 50,391.34

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Solution

The fourth proportional to 92,832.78, 128,109.38 and 50,391.34 is: 69,540.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,832.78 : 128,109.38 = 50,391.34 : x
  2. Step 2: Convert to fraction form
    92,832.78/128,109.38 = 50,391.34/x
  3. Step 3: Cross multiply
    92,832.78x = 128,109.38 × 50,391.34
  4. Step 4: Simplify right side
    92,832.78x = 6,455,603,324.77
  5. Step 5: Solve for x
    x = 6,455,603,324.77/92,832.78
  6. Step 6: Final answer
    x = 69,540.13

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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.