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Finding the Fourth Proportional to 72,144.36, 108,122.82 and 29,399.88

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Solution

The fourth proportional to 72,144.36, 108,122.82 and 29,399.88 is: 44,061.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,144.36 : 108,122.82 = 29,399.88 : x
  2. Step 2: Convert to fraction form
    72,144.36/108,122.82 = 29,399.88/x
  3. Step 3: Cross multiply
    72,144.36x = 108,122.82 × 29,399.88
  4. Step 4: Simplify right side
    72,144.36x = 3,178,797,933.26
  5. Step 5: Solve for x
    x = 3,178,797,933.26/72,144.36
  6. Step 6: Final answer
    x = 44,061.63

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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.