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Finding the Fourth Proportional to 218,960.40, 328,181.40 and 92,600.40

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Solution

The fourth proportional to 218,960.40, 328,181.40 and 92,600.40 is: 138,790.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,960.40 : 328,181.40 = 92,600.40 : x
  2. Step 2: Convert to fraction form
    218,960.40/328,181.40 = 92,600.40/x
  3. Step 3: Cross multiply
    218,960.40x = 328,181.40 × 92,600.40
  4. Step 4: Simplify right side
    218,960.40x = 30,389,728,912.56
  5. Step 5: Solve for x
    x = 30,389,728,912.56/218,960.40
  6. Step 6: Final answer
    x = 138,790.98

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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.