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Finding the Fourth Proportional to 221,975.94, 306,329.92 and 131,329.64

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Solution

The fourth proportional to 221,975.94, 306,329.92 and 131,329.64 is: 181,236.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,975.94 : 306,329.92 = 131,329.64 : x
  2. Step 2: Convert to fraction form
    221,975.94/306,329.92 = 131,329.64/x
  3. Step 3: Cross multiply
    221,975.94x = 306,329.92 × 131,329.64
  4. Step 4: Simplify right side
    221,975.94x = 40,230,198,114.83
  5. Step 5: Solve for x
    x = 40,230,198,114.83/221,975.94
  6. Step 6: Final answer
    x = 181,236.75

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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.