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Finding the Fourth Proportional to 208,760.80, 312,910.80 and 115,333.60

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Solution

The fourth proportional to 208,760.80, 312,910.80 and 115,333.60 is: 172,873.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,760.80 : 312,910.80 = 115,333.60 : x
  2. Step 2: Convert to fraction form
    208,760.80/312,910.80 = 115,333.60/x
  3. Step 3: Cross multiply
    208,760.80x = 312,910.80 × 115,333.60
  4. Step 4: Simplify right side
    208,760.80x = 36,089,129,042.88
  5. Step 5: Solve for x
    x = 36,089,129,042.88/208,760.80
  6. Step 6: Final answer
    x = 172,873.11

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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.