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Finding the Fourth Proportional to 121,728, 182,594.03 and 55,168.70

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Solution

The fourth proportional to 121,728, 182,594.03 and 55,168.70 is: 82,753.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,728 : 182,594.03 = 55,168.70 : x
  2. Step 2: Convert to fraction form
    121,728/182,594.03 = 55,168.70/x
  3. Step 3: Cross multiply
    121,728x = 182,594.03 × 55,168.70
  4. Step 4: Simplify right side
    121,728x = 10,073,474,074.05
  5. Step 5: Solve for x
    x = 10,073,474,074.05/121,728
  6. Step 6: Final answer
    x = 82,753.96

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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.