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Finding the Fourth Proportional to 139,889.97, 209,858.19 and 55,650.96

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Solution

The fourth proportional to 139,889.97, 209,858.19 and 55,650.96 is: 83,485.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,889.97 : 209,858.19 = 55,650.96 : x
  2. Step 2: Convert to fraction form
    139,889.97/209,858.19 = 55,650.96/x
  3. Step 3: Cross multiply
    139,889.97x = 209,858.19 × 55,650.96
  4. Step 4: Simplify right side
    139,889.97x = 11,678,809,737.36
  5. Step 5: Solve for x
    x = 11,678,809,737.36/139,889.97
  6. Step 6: Final answer
    x = 83,485.68

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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.