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Finding the Fourth Proportional to 199,351.40, 298,939.32 and 72,958.80

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Solution

The fourth proportional to 199,351.40, 298,939.32 and 72,958.80 is: 109,406.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,351.40 : 298,939.32 = 72,958.80 : x
  2. Step 2: Convert to fraction form
    199,351.40/298,939.32 = 72,958.80/x
  3. Step 3: Cross multiply
    199,351.40x = 298,939.32 × 72,958.80
  4. Step 4: Simplify right side
    199,351.40x = 21,810,254,060.02
  5. Step 5: Solve for x
    x = 21,810,254,060.02/199,351.40
  6. Step 6: Final answer
    x = 109,406.07

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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.