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Finding the Fourth Proportional to 72,489.29, 108,644.69 and 34,558.54

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Solution

The fourth proportional to 72,489.29, 108,644.69 and 34,558.54 is: 51,795.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,489.29 : 108,644.69 = 34,558.54 : x
  2. Step 2: Convert to fraction form
    72,489.29/108,644.69 = 34,558.54/x
  3. Step 3: Cross multiply
    72,489.29x = 108,644.69 × 34,558.54
  4. Step 4: Simplify right side
    72,489.29x = 3,754,601,679.94
  5. Step 5: Solve for x
    x = 3,754,601,679.94/72,489.29
  6. Step 6: Final answer
    x = 51,795.26

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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.