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Finding the Fourth Proportional to 136,894.80, 204,842.64 and 80,761.80

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Solution

The fourth proportional to 136,894.80, 204,842.64 and 80,761.80 is: 120,847.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,894.80 : 204,842.64 = 80,761.80 : x
  2. Step 2: Convert to fraction form
    136,894.80/204,842.64 = 80,761.80/x
  3. Step 3: Cross multiply
    136,894.80x = 204,842.64 × 80,761.80
  4. Step 4: Simplify right side
    136,894.80x = 16,543,460,939.88
  5. Step 5: Solve for x
    x = 16,543,460,939.88/136,894.80
  6. Step 6: Final answer
    x = 120,847.98

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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.