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Finding the Fourth Proportional to 203,607.36, 305,530.56 and 85,269.60

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Solution

The fourth proportional to 203,607.36, 305,530.56 and 85,269.60 is: 127,954.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,607.36 : 305,530.56 = 85,269.60 : x
  2. Step 2: Convert to fraction form
    203,607.36/305,530.56 = 85,269.60/x
  3. Step 3: Cross multiply
    203,607.36x = 305,530.56 × 85,269.60
  4. Step 4: Simplify right side
    203,607.36x = 26,052,468,638.98
  5. Step 5: Solve for x
    x = 26,052,468,638.98/203,607.36
  6. Step 6: Final answer
    x = 127,954.45

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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.