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Finding the Fourth Proportional to 69,688.40, 104,489.40 and 40,091.60

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Solution

The fourth proportional to 69,688.40, 104,489.40 and 40,091.60 is: 60,112.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,688.40 : 104,489.40 = 40,091.60 : x
  2. Step 2: Convert to fraction form
    69,688.40/104,489.40 = 40,091.60/x
  3. Step 3: Cross multiply
    69,688.40x = 104,489.40 × 40,091.60
  4. Step 4: Simplify right side
    69,688.40x = 4,189,147,229.04
  5. Step 5: Solve for x
    x = 4,189,147,229.04/69,688.40
  6. Step 6: Final answer
    x = 60,112.55

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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.