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Finding the Fourth Proportional to 72,679.40, 109,015.99 and 22,758.39

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Solution

The fourth proportional to 72,679.40, 109,015.99 and 22,758.39 is: 34,136.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,679.40 : 109,015.99 = 22,758.39 : x
  2. Step 2: Convert to fraction form
    72,679.40/109,015.99 = 22,758.39/x
  3. Step 3: Cross multiply
    72,679.40x = 109,015.99 × 22,758.39
  4. Step 4: Simplify right side
    72,679.40x = 2,481,028,416.66
  5. Step 5: Solve for x
    x = 2,481,028,416.66/72,679.40
  6. Step 6: Final answer
    x = 34,136.61

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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.