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Finding the Fourth Proportional to 78,891.60, 118,164.60 and 68,523.60

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Solution

The fourth proportional to 78,891.60, 118,164.60 and 68,523.60 is: 102,635.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,891.60 : 118,164.60 = 68,523.60 : x
  2. Step 2: Convert to fraction form
    78,891.60/118,164.60 = 68,523.60/x
  3. Step 3: Cross multiply
    78,891.60x = 118,164.60 × 68,523.60
  4. Step 4: Simplify right side
    78,891.60x = 8,097,063,784.56
  5. Step 5: Solve for x
    x = 8,097,063,784.56/78,891.60
  6. Step 6: Final answer
    x = 102,635.31

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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.