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Finding the Fourth Proportional to 118,732.16, 177,815.52 and 68,706.80

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Solution

The fourth proportional to 118,732.16, 177,815.52 and 68,706.80 is: 102,896.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,732.16 : 177,815.52 = 68,706.80 : x
  2. Step 2: Convert to fraction form
    118,732.16/177,815.52 = 68,706.80/x
  3. Step 3: Cross multiply
    118,732.16x = 177,815.52 × 68,706.80
  4. Step 4: Simplify right side
    118,732.16x = 12,217,135,369.54
  5. Step 5: Solve for x
    x = 12,217,135,369.54/118,732.16
  6. Step 6: Final answer
    x = 102,896.60

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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.