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Finding the Fourth Proportional to 71,940.68, 107,922.54 and 30,388.04

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Solution

The fourth proportional to 71,940.68, 107,922.54 and 30,388.04 is: 45,586.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,940.68 : 107,922.54 = 30,388.04 : x
  2. Step 2: Convert to fraction form
    71,940.68/107,922.54 = 30,388.04/x
  3. Step 3: Cross multiply
    71,940.68x = 107,922.54 × 30,388.04
  4. Step 4: Simplify right side
    71,940.68x = 3,279,554,462.42
  5. Step 5: Solve for x
    x = 3,279,554,462.42/71,940.68
  6. Step 6: Final answer
    x = 45,586.93

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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.