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Finding the Fourth Proportional to 118,811.80, 178,161.90 and 68,906.08

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Solution

The fourth proportional to 118,811.80, 178,161.90 and 68,906.08 is: 103,326.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,811.80 : 178,161.90 = 68,906.08 : x
  2. Step 2: Convert to fraction form
    118,811.80/178,161.90 = 68,906.08/x
  3. Step 3: Cross multiply
    118,811.80x = 178,161.90 × 68,906.08
  4. Step 4: Simplify right side
    118,811.80x = 12,276,438,134.35
  5. Step 5: Solve for x
    x = 12,276,438,134.35/118,811.80
  6. Step 6: Final answer
    x = 103,326.76

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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.