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Finding the Fourth Proportional to 73,230.20, 109,715.70 and 68,564.60

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Solution

The fourth proportional to 73,230.20, 109,715.70 and 68,564.60 is: 102,725.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,230.20 : 109,715.70 = 68,564.60 : x
  2. Step 2: Convert to fraction form
    73,230.20/109,715.70 = 68,564.60/x
  3. Step 3: Cross multiply
    73,230.20x = 109,715.70 × 68,564.60
  4. Step 4: Simplify right side
    73,230.20x = 7,522,613,084.22
  5. Step 5: Solve for x
    x = 7,522,613,084.22/73,230.20
  6. Step 6: Final answer
    x = 102,725.56

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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.