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Finding the Fourth Proportional to 139,661.38, 209,494.02 and 39,821.58

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Solution

The fourth proportional to 139,661.38, 209,494.02 and 39,821.58 is: 59,732.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,661.38 : 209,494.02 = 39,821.58 : x
  2. Step 2: Convert to fraction form
    139,661.38/209,494.02 = 39,821.58/x
  3. Step 3: Cross multiply
    139,661.38x = 209,494.02 × 39,821.58
  4. Step 4: Simplify right side
    139,661.38x = 8,342,382,876.95
  5. Step 5: Solve for x
    x = 8,342,382,876.95/139,661.38
  6. Step 6: Final answer
    x = 59,732.93

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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.