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Finding the Fourth Proportional to 192,868.95, 289,349.62 and 80,486.65

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Solution

The fourth proportional to 192,868.95, 289,349.62 and 80,486.65 is: 120,749.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,868.95 : 289,349.62 = 80,486.65 : x
  2. Step 2: Convert to fraction form
    192,868.95/289,349.62 = 80,486.65/x
  3. Step 3: Cross multiply
    192,868.95x = 289,349.62 × 80,486.65
  4. Step 4: Simplify right side
    192,868.95x = 23,288,781,592.57
  5. Step 5: Solve for x
    x = 23,288,781,592.57/192,868.95
  6. Step 6: Final answer
    x = 120,749.25

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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.