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Finding the Fourth Proportional to 259,252.91, 388,879.37 and 81,773.76

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Solution

The fourth proportional to 259,252.91, 388,879.37 and 81,773.76 is: 122,660.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,252.91 : 388,879.37 = 81,773.76 : x
  2. Step 2: Convert to fraction form
    259,252.91/388,879.37 = 81,773.76/x
  3. Step 3: Cross multiply
    259,252.91x = 388,879.37 × 81,773.76
  4. Step 4: Simplify right side
    259,252.91x = 31,800,127,862.46
  5. Step 5: Solve for x
    x = 31,800,127,862.46/259,252.91
  6. Step 6: Final answer
    x = 122,660.64

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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.