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Finding the Fourth Proportional to 259,737.36, 389,620.86 and 72,763.44

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Solution

The fourth proportional to 259,737.36, 389,620.86 and 72,763.44 is: 109,149.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,737.36 : 389,620.86 = 72,763.44 : x
  2. Step 2: Convert to fraction form
    259,737.36/389,620.86 = 72,763.44/x
  3. Step 3: Cross multiply
    259,737.36x = 389,620.86 × 72,763.44
  4. Step 4: Simplify right side
    259,737.36x = 28,350,154,069.36
  5. Step 5: Solve for x
    x = 28,350,154,069.36/259,737.36
  6. Step 6: Final answer
    x = 109,149.31

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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.