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Finding the Fourth Proportional to 136,893.40, 204,840.53 and 80,760.40

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Solution

The fourth proportional to 136,893.40, 204,840.53 and 80,760.40 is: 120,845.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,893.40 : 204,840.53 = 80,760.40 : x
  2. Step 2: Convert to fraction form
    136,893.40/204,840.53 = 80,760.40/x
  3. Step 3: Cross multiply
    136,893.40x = 204,840.53 × 80,760.40
  4. Step 4: Simplify right side
    136,893.40x = 16,543,002,525.96
  5. Step 5: Solve for x
    x = 16,543,002,525.96/136,893.40
  6. Step 6: Final answer
    x = 120,845.88

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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.