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Finding the Fourth Proportional to 104,388.57, 156,661.58 and 76,380.88

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Solution

The fourth proportional to 104,388.57, 156,661.58 and 76,380.88 is: 114,628.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,388.57 : 156,661.58 = 76,380.88 : x
  2. Step 2: Convert to fraction form
    104,388.57/156,661.58 = 76,380.88/x
  3. Step 3: Cross multiply
    104,388.57x = 156,661.58 × 76,380.88
  4. Step 4: Simplify right side
    104,388.57x = 11,965,949,446.60
  5. Step 5: Solve for x
    x = 11,965,949,446.60/104,388.57
  6. Step 6: Final answer
    x = 114,628.92

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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.