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Finding the Fourth Proportional to 108,900, 149,815.44 and 104,234.40

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Solution

The fourth proportional to 108,900, 149,815.44 and 104,234.40 is: 143,396.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,900 : 149,815.44 = 104,234.40 : x
  2. Step 2: Convert to fraction form
    108,900/149,815.44 = 104,234.40/x
  3. Step 3: Cross multiply
    108,900x = 149,815.44 × 104,234.40
  4. Step 4: Simplify right side
    108,900x = 15,615,922,499.14
  5. Step 5: Solve for x
    x = 15,615,922,499.14/108,900
  6. Step 6: Final answer
    x = 143,396.90

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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.