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Finding the Fourth Proportional to 118,265, 163,205.70 and 80,605.04

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Solution

The fourth proportional to 118,265, 163,205.70 and 80,605.04 is: 111,234.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,265 : 163,205.70 = 80,605.04 : x
  2. Step 2: Convert to fraction form
    118,265/163,205.70 = 80,605.04/x
  3. Step 3: Cross multiply
    118,265x = 163,205.70 × 80,605.04
  4. Step 4: Simplify right side
    118,265x = 13,155,201,976.73
  5. Step 5: Solve for x
    x = 13,155,201,976.73/118,265
  6. Step 6: Final answer
    x = 111,234.96

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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.