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Finding the Fourth Proportional to 192,684.80, 289,021.80 and 87,503.60

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Solution

The fourth proportional to 192,684.80, 289,021.80 and 87,503.60 is: 131,252.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,684.80 : 289,021.80 = 87,503.60 : x
  2. Step 2: Convert to fraction form
    192,684.80/289,021.80 = 87,503.60/x
  3. Step 3: Cross multiply
    192,684.80x = 289,021.80 × 87,503.60
  4. Step 4: Simplify right side
    192,684.80x = 25,290,447,978.48
  5. Step 5: Solve for x
    x = 25,290,447,978.48/192,684.80
  6. Step 6: Final answer
    x = 131,252.95

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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.