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Finding the Fourth Proportional to 135,647.52, 203,513.63 and 81,671.37

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Solution

The fourth proportional to 135,647.52, 203,513.63 and 81,671.37 is: 122,532.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,647.52 : 203,513.63 = 81,671.37 : x
  2. Step 2: Convert to fraction form
    135,647.52/203,513.63 = 81,671.37/x
  3. Step 3: Cross multiply
    135,647.52x = 203,513.63 × 81,671.37
  4. Step 4: Simplify right side
    135,647.52x = 16,621,236,975.77
  5. Step 5: Solve for x
    x = 16,621,236,975.77/135,647.52
  6. Step 6: Final answer
    x = 122,532.55

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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.