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Finding the Fourth Proportional to 259,984.76, 389,999.21 and 72,996.26

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Solution

The fourth proportional to 259,984.76, 389,999.21 and 72,996.26 is: 109,500.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,984.76 : 389,999.21 = 72,996.26 : x
  2. Step 2: Convert to fraction form
    259,984.76/389,999.21 = 72,996.26/x
  3. Step 3: Cross multiply
    259,984.76x = 389,999.21 × 72,996.26
  4. Step 4: Simplify right side
    259,984.76x = 28,468,481,417.98
  5. Step 5: Solve for x
    x = 28,468,481,417.98/259,984.76
  6. Step 6: Final answer
    x = 109,500.58

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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.