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Finding the Fourth Proportional to 259,027.88, 388,563.68 and 72,039.38

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Solution

The fourth proportional to 259,027.88, 388,563.68 and 72,039.38 is: 108,065.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,027.88 : 388,563.68 = 72,039.38 : x
  2. Step 2: Convert to fraction form
    259,027.88/388,563.68 = 72,039.38/x
  3. Step 3: Cross multiply
    259,027.88x = 388,563.68 × 72,039.38
  4. Step 4: Simplify right side
    259,027.88x = 27,991,884,835.00
  5. Step 5: Solve for x
    x = 27,991,884,835.00/259,027.88
  6. Step 6: Final answer
    x = 108,065.14

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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.