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Finding the Fourth Proportional to 139,396.65, 209,076.97 and 44,618.90

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Solution

The fourth proportional to 139,396.65, 209,076.97 and 44,618.90 is: 66,922.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,396.65 : 209,076.97 = 44,618.90 : x
  2. Step 2: Convert to fraction form
    139,396.65/209,076.97 = 44,618.90/x
  3. Step 3: Cross multiply
    139,396.65x = 209,076.97 × 44,618.90
  4. Step 4: Simplify right side
    139,396.65x = 9,328,784,645.01
  5. Step 5: Solve for x
    x = 9,328,784,645.01/139,396.65
  6. Step 6: Final answer
    x = 66,922.59

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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.