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Finding the Fourth Proportional to 118,678, 163,793.96 and 67,690.84

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Solution

The fourth proportional to 118,678, 163,793.96 and 67,690.84 is: 93,423.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,678 : 163,793.96 = 67,690.84 : x
  2. Step 2: Convert to fraction form
    118,678/163,793.96 = 67,690.84/x
  3. Step 3: Cross multiply
    118,678x = 163,793.96 × 67,690.84
  4. Step 4: Simplify right side
    118,678x = 11,087,350,739.33
  5. Step 5: Solve for x
    x = 11,087,350,739.33/118,678
  6. Step 6: Final answer
    x = 93,423.81

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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.