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Finding the Fourth Proportional to 118,115.20, 177,059.40 and 39,188.80

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Solution

The fourth proportional to 118,115.20, 177,059.40 and 39,188.80 is: 58,745.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,115.20 : 177,059.40 = 39,188.80 : x
  2. Step 2: Convert to fraction form
    118,115.20/177,059.40 = 39,188.80/x
  3. Step 3: Cross multiply
    118,115.20x = 177,059.40 × 39,188.80
  4. Step 4: Simplify right side
    118,115.20x = 6,938,745,414.72
  5. Step 5: Solve for x
    x = 6,938,745,414.72/118,115.20
  6. Step 6: Final answer
    x = 58,745.58

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1.5x scale

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.