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Finding the Fourth Proportional to 139,291.76, 209,020.66 and 50,552.20

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Solution

The fourth proportional to 139,291.76, 209,020.66 and 50,552.20 is: 75,858.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,291.76 : 209,020.66 = 50,552.20 : x
  2. Step 2: Convert to fraction form
    139,291.76/209,020.66 = 50,552.20/x
  3. Step 3: Cross multiply
    139,291.76x = 209,020.66 × 50,552.20
  4. Step 4: Simplify right side
    139,291.76x = 10,566,454,208.45
  5. Step 5: Solve for x
    x = 10,566,454,208.45/139,291.76
  6. Step 6: Final answer
    x = 75,858.43

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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.