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Finding the Fourth Proportional to 192,639.02, 288,960.51 and 86,028.40

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Solution

The fourth proportional to 192,639.02, 288,960.51 and 86,028.40 is: 129,043.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,639.02 : 288,960.51 = 86,028.40 : x
  2. Step 2: Convert to fraction form
    192,639.02/288,960.51 = 86,028.40/x
  3. Step 3: Cross multiply
    192,639.02x = 288,960.51 × 86,028.40
  4. Step 4: Simplify right side
    192,639.02x = 24,858,811,834.99
  5. Step 5: Solve for x
    x = 24,858,811,834.99/192,639.02
  6. Step 6: Final answer
    x = 129,043.49

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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.