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Finding the Fourth Proportional to 139,916.97, 209,838.60 and 55,673.73

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Solution

The fourth proportional to 139,916.97, 209,838.60 and 55,673.73 is: 83,495.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,916.97 : 209,838.60 = 55,673.73 : x
  2. Step 2: Convert to fraction form
    139,916.97/209,838.60 = 55,673.73/x
  3. Step 3: Cross multiply
    139,916.97x = 209,838.60 × 55,673.73
  4. Step 4: Simplify right side
    139,916.97x = 11,682,497,559.98
  5. Step 5: Solve for x
    x = 11,682,497,559.98/139,916.97
  6. Step 6: Final answer
    x = 83,495.93

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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.