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Finding the Fourth Proportional to 218,731.80, 328,143.48 and 92,372.44

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Solution

The fourth proportional to 218,731.80, 328,143.48 and 92,372.44 is: 138,577.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,731.80 : 328,143.48 = 92,372.44 : x
  2. Step 2: Convert to fraction form
    218,731.80/328,143.48 = 92,372.44/x
  3. Step 3: Cross multiply
    218,731.80x = 328,143.48 × 92,372.44
  4. Step 4: Simplify right side
    218,731.80x = 30,311,413,917.69
  5. Step 5: Solve for x
    x = 30,311,413,917.69/218,731.80
  6. Step 6: Final answer
    x = 138,577.99

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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.