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Finding the Fourth Proportional to 259,337.92, 389,006.94 and 81,858.76

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Solution

The fourth proportional to 259,337.92, 389,006.94 and 81,858.76 is: 122,788.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,337.92 : 389,006.94 = 81,858.76 : x
  2. Step 2: Convert to fraction form
    259,337.92/389,006.94 = 81,858.76/x
  3. Step 3: Cross multiply
    259,337.92x = 389,006.94 × 81,858.76
  4. Step 4: Simplify right side
    259,337.92x = 31,843,625,739.79
  5. Step 5: Solve for x
    x = 31,843,625,739.79/259,337.92
  6. Step 6: Final answer
    x = 122,788.16

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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.