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Finding the Fourth Proportional to 118,778.40, 178,169.49 and 39,893.31

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Solution

The fourth proportional to 118,778.40, 178,169.49 and 39,893.31 is: 59,840.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,778.40 : 178,169.49 = 39,893.31 : x
  2. Step 2: Convert to fraction form
    118,778.40/178,169.49 = 39,893.31/x
  3. Step 3: Cross multiply
    118,778.40x = 178,169.49 × 39,893.31
  4. Step 4: Simplify right side
    118,778.40x = 7,107,770,697.11
  5. Step 5: Solve for x
    x = 7,107,770,697.11/118,778.40
  6. Step 6: Final answer
    x = 59,840.60

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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.