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Finding the Fourth Proportional to 139,907.28, 209,922.74 and 73,331.48

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Solution

The fourth proportional to 139,907.28, 209,922.74 and 73,331.48 is: 110,029.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,907.28 : 209,922.74 = 73,331.48 : x
  2. Step 2: Convert to fraction form
    139,907.28/209,922.74 = 73,331.48/x
  3. Step 3: Cross multiply
    139,907.28x = 209,922.74 × 73,331.48
  4. Step 4: Simplify right side
    139,907.28x = 15,393,945,209.86
  5. Step 5: Solve for x
    x = 15,393,945,209.86/139,907.28
  6. Step 6: Final answer
    x = 110,029.62

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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.