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Finding the Fourth Proportional to 259,252.79, 388,879.18 and 81,773.63

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Solution

The fourth proportional to 259,252.79, 388,879.18 and 81,773.63 is: 122,660.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,252.79 : 388,879.18 = 81,773.63 : x
  2. Step 2: Convert to fraction form
    259,252.79/388,879.18 = 81,773.63/x
  3. Step 3: Cross multiply
    259,252.79x = 388,879.18 × 81,773.63
  4. Step 4: Simplify right side
    259,252.79x = 31,800,061,489.49
  5. Step 5: Solve for x
    x = 31,800,061,489.49/259,252.79
  6. Step 6: Final answer
    x = 122,660.44

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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.