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Finding the Fourth Proportional to 139,391.80, 209,100.65 and 39,554.44

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Solution

The fourth proportional to 139,391.80, 209,100.65 and 39,554.44 is: 59,335.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,391.80 : 209,100.65 = 39,554.44 : x
  2. Step 2: Convert to fraction form
    139,391.80/209,100.65 = 39,554.44/x
  3. Step 3: Cross multiply
    139,391.80x = 209,100.65 × 39,554.44
  4. Step 4: Simplify right side
    139,391.80x = 8,270,859,114.39
  5. Step 5: Solve for x
    x = 8,270,859,114.39/139,391.80
  6. Step 6: Final answer
    x = 59,335.33

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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.