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Finding the Fourth Proportional to 168,503, 252,948.90 and 85,571.96

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Solution

The fourth proportional to 168,503, 252,948.90 and 85,571.96 is: 128,456.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,503 : 252,948.90 = 85,571.96 : x
  2. Step 2: Convert to fraction form
    168,503/252,948.90 = 85,571.96/x
  3. Step 3: Cross multiply
    168,503x = 252,948.90 × 85,571.96
  4. Step 4: Simplify right side
    168,503x = 21,645,333,152.84
  5. Step 5: Solve for x
    x = 21,645,333,152.84/168,503
  6. Step 6: Final answer
    x = 128,456.66

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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.