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Finding the Fourth Proportional to 192,492.80, 288,739.20 and 52,251.20

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Solution

The fourth proportional to 192,492.80, 288,739.20 and 52,251.20 is: 78,376.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,492.80 : 288,739.20 = 52,251.20 : x
  2. Step 2: Convert to fraction form
    192,492.80/288,739.20 = 52,251.20/x
  3. Step 3: Cross multiply
    192,492.80x = 288,739.20 × 52,251.20
  4. Step 4: Simplify right side
    192,492.80x = 15,086,969,687.04
  5. Step 5: Solve for x
    x = 15,086,969,687.04/192,492.80
  6. Step 6: Final answer
    x = 78,376.80

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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.