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Finding the Fourth Proportional to 118,469.70, 177,445.35 and 71,640.90

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Solution

The fourth proportional to 118,469.70, 177,445.35 and 71,640.90 is: 107,304.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,469.70 : 177,445.35 = 71,640.90 : x
  2. Step 2: Convert to fraction form
    118,469.70/177,445.35 = 71,640.90/x
  3. Step 3: Cross multiply
    118,469.70x = 177,445.35 × 71,640.90
  4. Step 4: Simplify right side
    118,469.70x = 12,712,344,574.82
  5. Step 5: Solve for x
    x = 12,712,344,574.82/118,469.70
  6. Step 6: Final answer
    x = 107,304.61

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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.