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Finding the Fourth Proportional to 203,517.55, 305,290.90 and 53,756.34

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Solution

The fourth proportional to 203,517.55, 305,290.90 and 53,756.34 is: 80,638.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,517.55 : 305,290.90 = 53,756.34 : x
  2. Step 2: Convert to fraction form
    203,517.55/305,290.90 = 53,756.34/x
  3. Step 3: Cross multiply
    203,517.55x = 305,290.90 × 53,756.34
  4. Step 4: Simplify right side
    203,517.55x = 16,411,321,419.31
  5. Step 5: Solve for x
    x = 16,411,321,419.31/203,517.55
  6. Step 6: Final answer
    x = 80,638.36

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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.