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Finding the Fourth Proportional to 138,099.03, 207,175.28 and 53,855.79

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Solution

The fourth proportional to 138,099.03, 207,175.28 and 53,855.79 is: 80,794.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,099.03 : 207,175.28 = 53,855.79 : x
  2. Step 2: Convert to fraction form
    138,099.03/207,175.28 = 53,855.79/x
  3. Step 3: Cross multiply
    138,099.03x = 207,175.28 × 53,855.79
  4. Step 4: Simplify right side
    138,099.03x = 11,157,588,372.87
  5. Step 5: Solve for x
    x = 11,157,588,372.87/138,099.03
  6. Step 6: Final answer
    x = 80,794.11

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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.