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Finding the Fourth Proportional to 157,791.60, 236,629.80 and 78,879.60

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Solution

The fourth proportional to 157,791.60, 236,629.80 and 78,879.60 is: 118,290.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,791.60 : 236,629.80 = 78,879.60 : x
  2. Step 2: Convert to fraction form
    157,791.60/236,629.80 = 78,879.60/x
  3. Step 3: Cross multiply
    157,791.60x = 236,629.80 × 78,879.60
  4. Step 4: Simplify right side
    157,791.60x = 18,665,263,972.08
  5. Step 5: Solve for x
    x = 18,665,263,972.08/157,791.60
  6. Step 6: Final answer
    x = 118,290.61

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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.