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Finding the Fourth Proportional to 259,879.26, 389,833.47 and 72,905.34

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Solution

The fourth proportional to 259,879.26, 389,833.47 and 72,905.34 is: 109,362.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,879.26 : 389,833.47 = 72,905.34 : x
  2. Step 2: Convert to fraction form
    259,879.26/389,833.47 = 72,905.34/x
  3. Step 3: Cross multiply
    259,879.26x = 389,833.47 × 72,905.34
  4. Step 4: Simplify right side
    259,879.26x = 28,420,941,673.73
  5. Step 5: Solve for x
    x = 28,420,941,673.73/259,879.26
  6. Step 6: Final answer
    x = 109,362.10

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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.