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Finding the Fourth Proportional to 79,991.20, 119,929.20 and 44,941.60

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Solution

The fourth proportional to 79,991.20, 119,929.20 and 44,941.60 is: 67,380.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,991.20 : 119,929.20 = 44,941.60 : x
  2. Step 2: Convert to fraction form
    79,991.20/119,929.20 = 44,941.60/x
  3. Step 3: Cross multiply
    79,991.20x = 119,929.20 × 44,941.60
  4. Step 4: Simplify right side
    79,991.20x = 5,389,810,134.72
  5. Step 5: Solve for x
    x = 5,389,810,134.72/79,991.20
  6. Step 6: Final answer
    x = 67,380.04

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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.