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Finding the Fourth Proportional to 135,871.92, 203,865.51 and 72,675.59

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Solution

The fourth proportional to 135,871.92, 203,865.51 and 72,675.59 is: 109,044.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,871.92 : 203,865.51 = 72,675.59 : x
  2. Step 2: Convert to fraction form
    135,871.92/203,865.51 = 72,675.59/x
  3. Step 3: Cross multiply
    135,871.92x = 203,865.51 × 72,675.59
  4. Step 4: Simplify right side
    135,871.92x = 14,816,045,200.57
  5. Step 5: Solve for x
    x = 14,816,045,200.57/135,871.92
  6. Step 6: Final answer
    x = 109,044.20

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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.