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Finding the Fourth Proportional to 115,404.30, 173,106.45 and 108,405.90

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Solution

The fourth proportional to 115,404.30, 173,106.45 and 108,405.90 is: 162,608.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,404.30 : 173,106.45 = 108,405.90 : x
  2. Step 2: Convert to fraction form
    115,404.30/173,106.45 = 108,405.90/x
  3. Step 3: Cross multiply
    115,404.30x = 173,106.45 × 108,405.90
  4. Step 4: Simplify right side
    115,404.30x = 18,765,760,508.06
  5. Step 5: Solve for x
    x = 18,765,760,508.06/115,404.30
  6. Step 6: Final answer
    x = 162,608.85

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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.