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Finding the Fourth Proportional to 118,717.67, 178,076.16 and 91,739.27

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Solution

The fourth proportional to 118,717.67, 178,076.16 and 91,739.27 is: 137,608.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,717.67 : 178,076.16 = 91,739.27 : x
  2. Step 2: Convert to fraction form
    118,717.67/178,076.16 = 91,739.27/x
  3. Step 3: Cross multiply
    118,717.67x = 178,076.16 × 91,739.27
  4. Step 4: Simplify right side
    118,717.67x = 16,336,577,367.99
  5. Step 5: Solve for x
    x = 16,336,577,367.99/118,717.67
  6. Step 6: Final answer
    x = 137,608.64

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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.