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Finding the Fourth Proportional to 136,650.70, 205,062.45 and 80,490.70

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Solution

The fourth proportional to 136,650.70, 205,062.45 and 80,490.70 is: 120,786.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,650.70 : 205,062.45 = 80,490.70 : x
  2. Step 2: Convert to fraction form
    136,650.70/205,062.45 = 80,490.70/x
  3. Step 3: Cross multiply
    136,650.70x = 205,062.45 × 80,490.70
  4. Step 4: Simplify right side
    136,650.70x = 16,505,620,144.22
  5. Step 5: Solve for x
    x = 16,505,620,144.22/136,650.70
  6. Step 6: Final answer
    x = 120,786.94

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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.