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Finding the Fourth Proportional to 104,099.94, 155,913.42 and 81,469.62

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Solution

The fourth proportional to 104,099.94, 155,913.42 and 81,469.62 is: 122,019.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,099.94 : 155,913.42 = 81,469.62 : x
  2. Step 2: Convert to fraction form
    104,099.94/155,913.42 = 81,469.62/x
  3. Step 3: Cross multiply
    104,099.94x = 155,913.42 × 81,469.62
  4. Step 4: Simplify right side
    104,099.94x = 12,702,207,080.30
  5. Step 5: Solve for x
    x = 12,702,207,080.30/104,099.94
  6. Step 6: Final answer
    x = 122,019.35

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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.