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Finding the Fourth Proportional to 118,764.86, 178,163.68 and 39,901.64

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Solution

The fourth proportional to 118,764.86, 178,163.68 and 39,901.64 is: 59,857.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,764.86 : 178,163.68 = 39,901.64 : x
  2. Step 2: Convert to fraction form
    118,764.86/178,163.68 = 39,901.64/x
  3. Step 3: Cross multiply
    118,764.86x = 178,163.68 × 39,901.64
  4. Step 4: Simplify right side
    118,764.86x = 7,109,023,020.44
  5. Step 5: Solve for x
    x = 7,109,023,020.44/118,764.86
  6. Step 6: Final answer
    x = 59,857.97

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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.