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Finding the Fourth Proportional to 128,093.95, 192,147.93 and 53,221.67

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Solution

The fourth proportional to 128,093.95, 192,147.93 and 53,221.67 is: 79,835.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,093.95 : 192,147.93 = 53,221.67 : x
  2. Step 2: Convert to fraction form
    128,093.95/192,147.93 = 53,221.67/x
  3. Step 3: Cross multiply
    128,093.95x = 192,147.93 × 53,221.67
  4. Step 4: Simplify right side
    128,093.95x = 10,226,433,721.64
  5. Step 5: Solve for x
    x = 10,226,433,721.64/128,093.95
  6. Step 6: Final answer
    x = 79,835.42

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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.