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Finding the Fourth Proportional to 198,889.70, 298,242.06 and 72,441.92

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Solution

The fourth proportional to 198,889.70, 298,242.06 and 72,441.92 is: 108,629.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,889.70 : 298,242.06 = 72,441.92 : x
  2. Step 2: Convert to fraction form
    198,889.70/298,242.06 = 72,441.92/x
  3. Step 3: Cross multiply
    198,889.70x = 298,242.06 × 72,441.92
  4. Step 4: Simplify right side
    198,889.70x = 21,605,225,959.94
  5. Step 5: Solve for x
    x = 21,605,225,959.94/198,889.70
  6. Step 6: Final answer
    x = 108,629.18

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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.