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Finding the Fourth Proportional to 72,536.89, 100,201.82 and 68,989.92

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Solution

The fourth proportional to 72,536.89, 100,201.82 and 68,989.92 is: 95,302.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,536.89 : 100,201.82 = 68,989.92 : x
  2. Step 2: Convert to fraction form
    72,536.89/100,201.82 = 68,989.92/x
  3. Step 3: Cross multiply
    72,536.89x = 100,201.82 × 68,989.92
  4. Step 4: Simplify right side
    72,536.89x = 6,912,915,545.65
  5. Step 5: Solve for x
    x = 6,912,915,545.65/72,536.89
  6. Step 6: Final answer
    x = 95,302.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.