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Finding the Fourth Proportional to 92,640.06, 138,890.97 and 43,380.54

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Solution

The fourth proportional to 92,640.06, 138,890.97 and 43,380.54 is: 65,038.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,640.06 : 138,890.97 = 43,380.54 : x
  2. Step 2: Convert to fraction form
    92,640.06/138,890.97 = 43,380.54/x
  3. Step 3: Cross multiply
    92,640.06x = 138,890.97 × 43,380.54
  4. Step 4: Simplify right side
    92,640.06x = 6,025,165,279.72
  5. Step 5: Solve for x
    x = 6,025,165,279.72/92,640.06
  6. Step 6: Final answer
    x = 65,038.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.