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Finding the Fourth Proportional to 117,951.78, 162,751.09 and 74,938.27

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Solution

The fourth proportional to 117,951.78, 162,751.09 and 74,938.27 is: 103,400.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,951.78 : 162,751.09 = 74,938.27 : x
  2. Step 2: Convert to fraction form
    117,951.78/162,751.09 = 74,938.27/x
  3. Step 3: Cross multiply
    117,951.78x = 162,751.09 × 74,938.27
  4. Step 4: Simplify right side
    117,951.78x = 12,196,285,764.12
  5. Step 5: Solve for x
    x = 12,196,285,764.12/117,951.78
  6. Step 6: Final answer
    x = 103,400.61

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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.