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Finding the Fourth Proportional to 72,694.10, 108,976.53 and 28,310.60

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Solution

The fourth proportional to 72,694.10, 108,976.53 and 28,310.60 is: 42,440.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,694.10 : 108,976.53 = 28,310.60 : x
  2. Step 2: Convert to fraction form
    72,694.10/108,976.53 = 28,310.60/x
  3. Step 3: Cross multiply
    72,694.10x = 108,976.53 × 28,310.60
  4. Step 4: Simplify right side
    72,694.10x = 3,085,190,950.22
  5. Step 5: Solve for x
    x = 3,085,190,950.22/72,694.10
  6. Step 6: Final answer
    x = 42,440.73

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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.