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Finding the Fourth Proportional to 123,297.92, 169,996.22 and 100,613.87

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Solution

The fourth proportional to 123,297.92, 169,996.22 and 100,613.87 is: 138,720.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,297.92 : 169,996.22 = 100,613.87 : x
  2. Step 2: Convert to fraction form
    123,297.92/169,996.22 = 100,613.87/x
  3. Step 3: Cross multiply
    123,297.92x = 169,996.22 × 100,613.87
  4. Step 4: Simplify right side
    123,297.92x = 17,103,977,579.57
  5. Step 5: Solve for x
    x = 17,103,977,579.57/123,297.92
  6. Step 6: Final answer
    x = 138,720.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.