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Finding the Fourth Proportional to 139,907.77, 209,923.49 and 73,331.98

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Solution

The fourth proportional to 139,907.77, 209,923.49 and 73,331.98 is: 110,030.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,907.77 : 209,923.49 = 73,331.98 : x
  2. Step 2: Convert to fraction form
    139,907.77/209,923.49 = 73,331.98/x
  3. Step 3: Cross multiply
    139,907.77x = 209,923.49 × 73,331.98
  4. Step 4: Simplify right side
    139,907.77x = 15,394,105,170.21
  5. Step 5: Solve for x
    x = 15,394,105,170.21/139,907.77
  6. Step 6: Final answer
    x = 110,030.38

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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.