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Finding the Fourth Proportional to 208,608.30, 312,912.45 and 113,801.85

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Solution

The fourth proportional to 208,608.30, 312,912.45 and 113,801.85 is: 170,702.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,608.30 : 312,912.45 = 113,801.85 : x
  2. Step 2: Convert to fraction form
    208,608.30/312,912.45 = 113,801.85/x
  3. Step 3: Cross multiply
    208,608.30x = 312,912.45 × 113,801.85
  4. Step 4: Simplify right side
    208,608.30x = 35,610,015,698.03
  5. Step 5: Solve for x
    x = 35,610,015,698.03/208,608.30
  6. Step 6: Final answer
    x = 170,702.78

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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.