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Finding the Fourth Proportional to 259,028.34, 388,564.38 and 72,039.84

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Solution

The fourth proportional to 259,028.34, 388,564.38 and 72,039.84 is: 108,065.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,028.34 : 388,564.38 = 72,039.84 : x
  2. Step 2: Convert to fraction form
    259,028.34/388,564.38 = 72,039.84/x
  3. Step 3: Cross multiply
    259,028.34x = 388,564.38 × 72,039.84
  4. Step 4: Simplify right side
    259,028.34x = 27,992,115,764.90
  5. Step 5: Solve for x
    x = 27,992,115,764.90/259,028.34
  6. Step 6: Final answer
    x = 108,065.84

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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.