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Finding the Fourth Proportional to 115,429.80, 173,144.70 and 108,978.60

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Solution

The fourth proportional to 115,429.80, 173,144.70 and 108,978.60 is: 163,467.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,429.80 : 173,144.70 = 108,978.60 : x
  2. Step 2: Convert to fraction form
    115,429.80/173,144.70 = 108,978.60/x
  3. Step 3: Cross multiply
    115,429.80x = 173,144.70 × 108,978.60
  4. Step 4: Simplify right side
    115,429.80x = 18,869,067,003.42
  5. Step 5: Solve for x
    x = 18,869,067,003.42/115,429.80
  6. Step 6: Final answer
    x = 163,467.90

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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.