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Finding the Fourth Proportional to 115,245.54, 172,933.92 and 92,019.60

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Solution

The fourth proportional to 115,245.54, 172,933.92 and 92,019.60 is: 138,081.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,245.54 : 172,933.92 = 92,019.60 : x
  2. Step 2: Convert to fraction form
    115,245.54/172,933.92 = 92,019.60/x
  3. Step 3: Cross multiply
    115,245.54x = 172,933.92 × 92,019.60
  4. Step 4: Simplify right side
    115,245.54x = 15,913,310,144.83
  5. Step 5: Solve for x
    x = 15,913,310,144.83/115,245.54
  6. Step 6: Final answer
    x = 138,081.79

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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.