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Finding the Fourth Proportional to 203,428.02, 305,107.20 and 53,669.86

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Solution

The fourth proportional to 203,428.02, 305,107.20 and 53,669.86 is: 80,495.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,428.02 : 305,107.20 = 53,669.86 : x
  2. Step 2: Convert to fraction form
    203,428.02/305,107.20 = 53,669.86/x
  3. Step 3: Cross multiply
    203,428.02x = 305,107.20 × 53,669.86
  4. Step 4: Simplify right side
    203,428.02x = 16,375,060,708.99
  5. Step 5: Solve for x
    x = 16,375,060,708.99/203,428.02
  6. Step 6: Final answer
    x = 80,495.60

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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.