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Finding the Fourth Proportional to 230,636.20, 345,921.90 and 72,880.60

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Solution

The fourth proportional to 230,636.20, 345,921.90 and 72,880.60 is: 109,310.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,636.20 : 345,921.90 = 72,880.60 : x
  2. Step 2: Convert to fraction form
    230,636.20/345,921.90 = 72,880.60/x
  3. Step 3: Cross multiply
    230,636.20x = 345,921.90 × 72,880.60
  4. Step 4: Simplify right side
    230,636.20x = 25,210,995,625.14
  5. Step 5: Solve for x
    x = 25,210,995,625.14/230,636.20
  6. Step 6: Final answer
    x = 109,310.66

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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.