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Finding the Fourth Proportional to 139,354.44, 209,017.42 and 38,161.49

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Solution

The fourth proportional to 139,354.44, 209,017.42 and 38,161.49 is: 57,238.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,354.44 : 209,017.42 = 38,161.49 : x
  2. Step 2: Convert to fraction form
    139,354.44/209,017.42 = 38,161.49/x
  3. Step 3: Cross multiply
    139,354.44x = 209,017.42 × 38,161.49
  4. Step 4: Simplify right side
    139,354.44x = 7,976,416,183.16
  5. Step 5: Solve for x
    x = 7,976,416,183.16/139,354.44
  6. Step 6: Final answer
    x = 57,238.34

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1.5x scale

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.