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Finding the Fourth Proportional to 128,093.70, 192,147.56 and 53,221.42

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Solution

The fourth proportional to 128,093.70, 192,147.56 and 53,221.42 is: 79,835.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,093.70 : 192,147.56 = 53,221.42 : x
  2. Step 2: Convert to fraction form
    128,093.70/192,147.56 = 53,221.42/x
  3. Step 3: Cross multiply
    128,093.70x = 192,147.56 × 53,221.42
  4. Step 4: Simplify right side
    128,093.70x = 10,226,365,992.74
  5. Step 5: Solve for x
    x = 10,226,365,992.74/128,093.70
  6. Step 6: Final answer
    x = 79,835.04

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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.