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Finding the Fourth Proportional to 136,218.80, 203,939.40 and 120,666.80

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Solution

The fourth proportional to 136,218.80, 203,939.40 and 120,666.80 is: 180,655.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,218.80 : 203,939.40 = 120,666.80 : x
  2. Step 2: Convert to fraction form
    136,218.80/203,939.40 = 120,666.80/x
  3. Step 3: Cross multiply
    136,218.80x = 203,939.40 × 120,666.80
  4. Step 4: Simplify right side
    136,218.80x = 24,608,714,791.92
  5. Step 5: Solve for x
    x = 24,608,714,791.92/136,218.80
  6. Step 6: Final answer
    x = 180,655.79

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1.5x scale

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.