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Finding the Fourth Proportional to 110,694.40, 166,041.60 and 72,640.60

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Solution

The fourth proportional to 110,694.40, 166,041.60 and 72,640.60 is: 108,960.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,694.40 : 166,041.60 = 72,640.60 : x
  2. Step 2: Convert to fraction form
    110,694.40/166,041.60 = 72,640.60/x
  3. Step 3: Cross multiply
    110,694.40x = 166,041.60 × 72,640.60
  4. Step 4: Simplify right side
    110,694.40x = 12,061,361,448.96
  5. Step 5: Solve for x
    x = 12,061,361,448.96/110,694.40
  6. Step 6: Final answer
    x = 108,960.90

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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.