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Finding the Fourth Proportional to 203,953.80, 305,930.70 and 115,380.30

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Solution

The fourth proportional to 203,953.80, 305,930.70 and 115,380.30 is: 173,070.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,953.80 : 305,930.70 = 115,380.30 : x
  2. Step 2: Convert to fraction form
    203,953.80/305,930.70 = 115,380.30/x
  3. Step 3: Cross multiply
    203,953.80x = 305,930.70 × 115,380.30
  4. Step 4: Simplify right side
    203,953.80x = 35,298,375,945.21
  5. Step 5: Solve for x
    x = 35,298,375,945.21/203,953.80
  6. Step 6: Final answer
    x = 173,070.45

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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.