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Finding the Fourth Proportional to 118,217.20, 177,034.20 and 78,559.60

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Solution

The fourth proportional to 118,217.20, 177,034.20 and 78,559.60 is: 117,645.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,217.20 : 177,034.20 = 78,559.60 : x
  2. Step 2: Convert to fraction form
    118,217.20/177,034.20 = 78,559.60/x
  3. Step 3: Cross multiply
    118,217.20x = 177,034.20 × 78,559.60
  4. Step 4: Simplify right side
    118,217.20x = 13,907,735,938.32
  5. Step 5: Solve for x
    x = 13,907,735,938.32/118,217.20
  6. Step 6: Final answer
    x = 117,645.62

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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.