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Finding the Fourth Proportional to 208,982.80, 313,608.60 and 115,555.60

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Solution

The fourth proportional to 208,982.80, 313,608.60 and 115,555.60 is: 173,407.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,982.80 : 313,608.60 = 115,555.60 : x
  2. Step 2: Convert to fraction form
    208,982.80/313,608.60 = 115,555.60/x
  3. Step 3: Cross multiply
    208,982.80x = 313,608.60 × 115,555.60
  4. Step 4: Simplify right side
    208,982.80x = 36,239,229,938.16
  5. Step 5: Solve for x
    x = 36,239,229,938.16/208,982.80
  6. Step 6: Final answer
    x = 173,407.72

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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.