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Finding the Fourth Proportional to 259,011.75, 388,539.63 and 72,023.25

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Solution

The fourth proportional to 259,011.75, 388,539.63 and 72,023.25 is: 108,040.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,011.75 : 388,539.63 = 72,023.25 : x
  2. Step 2: Convert to fraction form
    259,011.75/388,539.63 = 72,023.25/x
  3. Step 3: Cross multiply
    259,011.75x = 388,539.63 × 72,023.25
  4. Step 4: Simplify right side
    259,011.75x = 27,983,886,906.40
  5. Step 5: Solve for x
    x = 27,983,886,906.40/259,011.75
  6. Step 6: Final answer
    x = 108,040.99

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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.